Is this a solid rose gold and SS case ?

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I suspect that both the lugs and bezel are indeed solid gold.

Here is a LeCoultre I own which is the reverse, a solid gold case with steel lugs and back. It's a LECoultre case, but there is no indication as to gold content, but the weight and softness of the main case demonstrate that it is very likely solid gold.

 
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I suspect that both the lugs and bezel are indeed solid gold.

Here is a LeCoultre I own which is the reverse, a solid gold case with steel lugs and back. It's a LECoultre case, but there is no indication as to gold content, but the weight and softness of the main case demonstrate that it is very likely solid gold.


Wow great case! Looks like amazing dial, can we see the front ?
 
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Just to update that it's had a bath and there are still no hallmarks. I have two questions for the forum:

1. Looking at post no 2 in the thread - how much wear would a gold-filled lug take before it starts showing. The pictures show a watch with quite a bit of lug wear and I can't see any steel/base metal showing.
2. How would you confirm if something was solid rather than filled in the absence of the usual hallmarks or stamping?
 
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Just to update that it's had a bath and there are still no hallmarks. I have two questions for the forum:

1. Looking at post no 2 in the thread - how much wear would a gold-filled lug take before it starts showing. The pictures show a watch with quite a bit of lug wear and I can't see any steel/base metal showing.
2. How would you confirm if something was solid rather than filled in the absence of the usual hallmarks or stamping?
filled can be quite thick, but you would not expect to see the bar attachments in the gold.
 
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Thanks for all the replys everyone, it is an interesting case and I think worth exploring a bit further.....

It is 32mm, although the top to bottom lug size of 40mm means it obviously wears a bit bigger.

It is definitely rose gold, very strongly so, I have lots of other gold references in the house so it's easy to spot.

I gave it to my special lady friend a few years back, and so it sits in her watch case not mine, so I don't see it much. She has been refocusing her collection and asked if I thought she should keep or sell this one, and so I was researching it. I had always presumed it was gold plated, without ever thinking about it, but looking at it closely, it is definitely not plated.

It's also definitely not gold cap. I know how it appears in the rear photo, and I know how that can be misleading, but I have it here in my hand, the gold color completely covers the bottom surface of the lug without any SS visible, and my understanding with gold cap is the base metal would be visible on the underside of the lugs?

So as far as I can tell, it's either gold filled, or solid gold, unless someone has another option?

I would tend to presume that if it were solid gold there would be hallmarks on the lugs, and without such hallmarks, it is probably be gold filled. Sounds like others would agree on this thinking.

I am seeing other examples online, aside from the one posted above, and people keeping saying either 14K or 18K rose gold in the listings. I assume if someone says 14K or 18K, that means solid gold. But perhaps I am misunderstanding this, can you say 14K or 18K for gold filled? Maybe those are just advertising weasel words. Anyhow here's one (no hallmarks I can see), the texture on the back of the lugs looks the same to me, its just much cleaner:



https://www.acollectedman.com/colle...ograph-22261-watch-cal-481?variant=1740210179

Another example is right here on OF, this one:



The owner started out saying it was gold cap (perhaps meant gold filled?), then said it was solid rose gold, I assume based on further investigation. @knafel1983 perhaps you can clarify. Are there any hallmarks and what leads you to say it is solid gold?

Lastly, is there any test to resolve if it is gold filled or solid gold? (short of a deep scratch or some other destructive test method).

I had a metalsmith in Pennsylvania fabricate the lugs on my big XII. He said they were solid 14k rose gold, and his fabricated lugs match exactly, no difference in color. There is no brassing at all, even after aging and polishing of the original lugs. But according to the model number, starting with 2, that means stainless steel, so that doesn't mention the rose gold lugs, and no hallmarks.
Edited:
 
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So do we feel this above info can be applied to other case references ? Are we tipping towards a consensus on solid rose gold lugs with mixed metal cases ?
 
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So do we feel this above info can be applied to other case references ? Are we tipping towards a consensus on solid rose gold lugs with mixed metal cases ?

It's probable and we'd both like them to be but we haven't got any proof yet. Does anybody know a metallurgist who could advise how to prove it?
 
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It's probable and we'd both like them to be but we haven't got any proof yet. Does anybody know a metallurgist who could advise how to prove it?

 
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I’m not sure there are any non destructive ways to get proof
 
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It sounds daft but have you tried a strong magnet on the lugs? We know that brass (often the base metal for gold fill) and solid gold itself are non-magnetic but in the remote event of an attraction you’ll at least know that there’s something else under there (maybe even some steel like the rest of the case?)

This post was brought to you by Great Grandad Whoops who was a rag-and-bone man by trade, specialising in reclaimed brass door furniture.
 
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What do people think of a ladder bracelet on a ribbon lugs case ? (This watch belongs to my GF, not me)
 
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What do people think of a ladder bracelet on a ribbon lugs case ? (This watch belongs to my GF, not me)

I find the proportions off, B.
 
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Interesting to note there are many SS references in the UG archives that have SS case, start with 2XXXX, and have gold lugs and bezel. I believe these are all solid gold lugs/bezels. I tend to think the same applies to time only, so if I see a case that starts with reference 2 and I see gold lugs and/or bezel, I'm pretty sure it's solid....

Here's a few archives pics, there's more than this in Sala
 
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Thanks for all the replys everyone, it is an interesting case and I think worth exploring a bit further.....

It is 32mm, although the top to bottom lug size of 40mm means it obviously wears a bit bigger.

It is definitely rose gold, very strongly so, I have lots of other gold references in the house so it's easy to spot.

I gave it to my special lady friend a few years back, and so it sits in her watch case not mine, so I don't see it much. She has been refocusing her collection and asked if I thought she should keep or sell this one, and so I was researching it. I had always presumed it was gold plated, without ever thinking about it, but looking at it closely, it is definitely not plated.

It's also definitely not gold cap. I know how it appears in the rear photo, and I know how that can be misleading, but I have it here in my hand, the gold color completely covers the bottom surface of the lug without any SS visible, and my understanding with gold cap is the base metal would be visible on the underside of the lugs?

So as far as I can tell, it's either gold filled, or solid gold, unless someone has another option?

I would tend to presume that if it were solid gold there would be hallmarks on the lugs, and without such hallmarks, it is probably be gold filled. Sounds like others would agree on this thinking.

I am seeing other examples online, aside from the one posted above, and people keeping saying either 14K or 18K rose gold in the listings. I assume if someone says 14K or 18K, that means solid gold. But perhaps I am misunderstanding this, can you say 14K or 18K for gold filled? Maybe those are just advertising weasel words. Anyhow here's one (no hallmarks I can see), the texture on the back of the lugs looks the same to me, its just much cleaner:



https://www.acollectedman.com/colle...ograph-22261-watch-cal-481?variant=1740210179

Another example is right here on OF, this one:



The owner started out saying it was gold cap (perhaps meant gold filled?), then said it was solid rose gold, I assume based on further investigation. @knafel1983 perhaps you can clarify. Are there any hallmarks and what leads you to say it is solid gold?

Lastly, is there any test to resolve if it is gold filled or solid gold? (short of a deep scratch or some other destructive test method).
I have similar Gubelin two tone, lugs are solid gold.
 
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Thanks for all the replys everyone, it is an interesting case and I think worth exploring a bit further.....

It is 32mm, although the top to bottom lug size of 40mm means it obviously wears a bit bigger.

It is definitely rose gold, very strongly so, I have lots of other gold references in the house so it's easy to spot.

I gave it to my special lady friend a few years back, and so it sits in her watch case not mine, so I don't see it much. She has been refocusing her collection and asked if I thought she should keep or sell this one, and so I was researching it. I had always presumed it was gold plated, without ever thinking about it, but looking at it closely, it is definitely not plated.

It's also definitely not gold cap. I know how it appears in the rear photo, and I know how that can be misleading, but I have it here in my hand, the gold color completely covers the bottom surface of the lug without any SS visible, and my understanding with gold cap is the base metal would be visible on the underside of the lugs?

So as far as I can tell, it's either gold filled, or solid gold, unless someone has another option?

I would tend to presume that if it were solid gold there would be hallmarks on the lugs, and without such hallmarks, it is probably be gold filled. Sounds like others would agree on this thinking.

I am seeing other examples online, aside from the one posted above, and people keeping saying either 14K or 18K rose gold in the listings. I assume if someone says 14K or 18K, that means solid gold. But perhaps I am misunderstanding this, can you say 14K or 18K for gold filled? Maybe those are just advertising weasel words. Anyhow here's one (no hallmarks I can see), the texture on the back of the lugs looks the same to me, its just much cleaner:



https://www.acollectedman.com/colle...ograph-22261-watch-cal-481?variant=1740210179

Another example is right here on OF, this one:



The owner started out saying it was gold cap (perhaps meant gold filled?), then said it was solid rose gold, I assume based on further investigation. @knafel1983 perhaps you can clarify. Are there any hallmarks and what leads you to say it is solid gold?

Lastly, is there any test to resolve if it is gold filled or solid gold? (short of a deep scratch or some other destructive test method).

As the owner of this one: https://www.highlifewatches.com/store/p33/1943_Universal_Geneve_Tri-Compax_-_Ref._22261.html
I confirm that it is solid gold.
Cheers.
 
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Here's an interestingly-tarnished one.

https://www.ebay.co.uk/itm/VINTAGE-...296050?hash=item56dcd77872:g:QR0AAOSwrSte1qJN

s-l1600.jpg

Would solid gold discolour like this? Would this indicate 9k rather than 18k?
 
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A simple gold acid test would give the answer....


is that a non destructive test? The acid tests I have seen I thought you make a scratch in the metal to apply the solution?