Strange looking degradation

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I'm curious about this Seamaster Deville and am wondering what that mess is between the bottom lugs. I assume it's superficial given that this is stainless steel, but it looks worrying. What do people think it is?
 
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Wrist cheese is the colloquial term used here mostly,,,verdigris the somewhat nicer expression ...
 
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It's DNA. Save some and you'll be able to determine provenance, or clone the owner, whichever you prefer.
Edited:
 
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Wrist cheese is the colloquial term used here mostly,,,verdigris the somewhat nicer expression ...
Grody to the max! As Moon Zappa so eloquently put it.

I've never seen it that bad, and interesting it's only on one side. Is that normal?

Thank you folks
 
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Well, what’s “normal”... it’s not unheard of, just to an extent here that I’d assume the watch has never been cleaned. It might tell you something about the rest of it’s condition and I’m sure it hasn’t seen a watchmaker in quite a while, but if you like the watch itself and it’s technically fine / the price is such that repairs are in the budget than this shouldn’t necessarily put you off.

I’ve acquired a Genève that I had been looking for for a while (purple dial, orange second hand) the other day that looked similar. After a proper clean a beautiful watch revealed itself. Sometimes, this kind of wrist cheese means there’s a bargain to be picked up. Sometimes.
 
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It's in the crevices, and probably correlates to which way the watch would twist on the previous owner's wrist.
 
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Well, what’s “normal”... it’s not unheard of, just to an extent here that I’d assume the watch has never been cleaned. It might tell you something about the rest of it’s condition and I’m sure it hasn’t seen a watchmaker in quite a while, but if you like the watch itself and it’s technically fine / the price is such that repairs are in the budget than this shouldn’t necessarily put you off.

I’ve acquired a Genève that I had been looking for for a while (purple dial, orange second hand) the other day that looked similar. After a proper clean a beautiful watch revealed itself. Sometimes, this kind of wrist cheese means there’s a bargain to be picked up. Sometimes.
I do like it, and the fact that it hasn't been kept clean means that the edges are nice and crisp. I take the point about the movement. It's described as working so I'll take that as a good sign, but I'll check into how accurately it's running.
 
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As usual, factor in a service. Even if it still runs accurately, you’ll protect the movement from damage caused by old oil etc.
 
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It probably is wrist cheese - but there is also a distinct possibility that it is corroded. Despite our faith in stainless steel, the SS that was used when that watch was built is quite capable of rusting. I have seen some very presentable watches (on the face side) that have had deep corrosion around and under the back.

In the case of your watch I would want to see a pic with the back off.
 
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Not always superficial. I've found sometimes that moisture trapped between the cheese and steel can create pitting in the steel and for me. Means the case is garbage.

Majority of the time I avoid them unless others also do and I could get it cheap for the movement (if case is bad)

Haven't bought any watches in a good number of years though since my watchmakers passed away

DON
 
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Not always superficial. I've found sometimes that moisture trapped between the cheese and steel can create pitting in the steel and for me. Means the case is garbage.

Majority of the time I avoid them unless others also do and I could get it cheap for the movement (if case is bad)

Haven't bought any watches in a good number of years though since my watchmakers passed away

DON
It can mean that or it could be a diamond in the rough.
Picked up this Nivada a few years ago. It also had some nasty cheese.
s-l1600.jpg

After a visit to the watchmaker, this is what it looked like.

290726-79b7a91d2d749530836fe43a4debe34a.jpg
290725-b52982e348ca5f042c7bb50393af093c.jpg
 
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It can mean that or it could be a diamond in the rough.
Picked up this Nivada a few years ago. It also had some nasty cheese.
s-l1600.jpg

After a visit to the watchmaker, this is what it looked like.

290726-79b7a91d2d749530836fe43a4debe34a.jpg
290725-b52982e348ca5f042c7bb50393af093c.jpg

But there also appears to be corrosion between the lugs on the left side. Little on the right also

For your personnel use. It's fine, but I used to restore watches and if the case is bad and can't be cleaned up. It's a movement only purchase

DON
 
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It can mean that or it could be a diamond in the rough.
Picked up this Nivada a few years ago. It also had some nasty cheese.
s-l1600.jpg

After a visit to the watchmaker, this is what it looked like.

290726-79b7a91d2d749530836fe43a4debe34a.jpg
290725-b52982e348ca5f042c7bb50393af093c.jpg

Then he sold it to me 😁😁😁😁
 
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It probably is wrist cheese - but there is also a distinct possibility that it is corroded. Despite our faith in stainless steel, the SS that was used when that watch was built is quite capable of rusting. I have seen some very presentable watches (on the face side) that have had deep corrosion around and under the back.

In the case of your watch I would want to see a pic with the back off.

It is a front loader 😉
 
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Think I’ll ask for a movement shot but my guess is he doesn’t know how to open it.
 
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Think I’ll ask for a movement shot but my guess is he doesn’t know how to open it.
It is a front loader 😉

How about you tell us what it’s worth ?

It’s probably the best bit of Information needed 9/10.....
 
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How about you tell us what it’s worth ?

It’s probably the best bit of Information needed 9/10.....
I don't know what it's worth - It's in an auction. I'm trying to decide how much I'm prepared to bid for it. What do you think it's worth?
 
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Without more pics and a gander at the movement it's all a bit of a guess. You've posted 482 times so you must know your onions a bit;
Mid 60's (?) Seamaster Deville ..Stainless Steel case, non original strap, possible original crown (from what I can tell from the pics).Original dial (i think) in good shape...What do you think it's worth?