Sinn 104 from Chrono24, but a rotor issue (?)

RubenDhae · Jul 9, 2021

Hello everybody

I have bought and received today a Sinn 104.010 from Chrono24. The watch has been used, but in very very good condition.

However, later today, I noticed something with the rotor. The rotor doesn't spin as easily as I expected. I made a film of the "issue" and uploaded it here: https://youtube.com/shorts/CiyrEvEMahE

I just messaged the seller, and he said it's because the watch hasn't been used (much) in some time. He says the rotor will become smoother when wearing it often again. He claims it winds normally with regular wear, though I don't have the watch long enough to confirm this.

What are you guys' thoughts? Is this a (known) issue? Or just something normal, as the seller claims, and it will come better over time? How should I proceed?

Best regards
Ruben

hronists · Jul 9, 2021

well, it depends how much you paid, if you like watch etc. If I were you I'd bring it to my watchmaker to take off and clean auto winding bridge and clean wheels. It's a 30 minutes job.

hronists · Jul 9, 2021

and no, it won't get better with time.

RubenDhae · Jul 9, 2021

hronists
well, it depends how much you paid, if you like watch etc. If I were you I'd bring it to my watchmaker to take off and clean auto winding bridge and clean wheels. It's a 30 minutes job.

How much would a maintenance/repair like this cost?

dsio · Jul 9, 2021

Most watchmakers aren’t keen to take on part repairs and insist on a full service, how old is it, is there still a warranty and has it had a prior service?

Foo2rama · Jul 9, 2021

Man that’s a worse stick then my GF Seiko…

and no it will not get better.

Geezer · Jul 9, 2021

Does this problem only occur when the watch has been fully wound?

If this problem happens even before fully winding, it would seems there is a problem somewhere in the winding train.

If it happens only when the watch has been fully wound, it could also be that the mainspring doesn't slip properly inside the barrel.

In any case, a watchmaker should take a look at it.

hronists · Jul 10, 2021

RubenDhae
How much would a maintenance/repair like this cost?

I don't know how much it would cost for you. You have to find watchmaker first and speak with him. As already been mentioned - most watchmakers will insist on full service.

My theory is that rest of movement might be OK and you have problem with auto bridge. Therefore I see no reason to do full service. I also might be wrong 😀

Archer · Jul 10, 2021

Geezer
Does this problem only occur when the watch has been fully wound?

If this problem happens even before fully winding, it would seems there is a problem somewhere in the winding train.

If it happens only when the watch has been fully wound, it could also be that the mainspring doesn't slip properly inside the barrel.

In any case, a watchmaker should take a look at it.

In this case it doesn’t matter if the watch is fully wound or not. The 7750 only winds with the rotor moving in one direction, and in the other it has no winding, so should spin freely. The fact it is jammed up means it needs to be looked at.

My SWAG (scientific wild ass guess, if you are not familiar with the acronym) is that there is a screw that has backed out of the automatic winding bridge, and is catching on the underside of the rotor.

Cheers, Al

Geezer · Jul 10, 2021

You are right, except that it's not a 7750. I'm not that familiar with Sinn models, but in the video it looks like a 2824-2, which has a bi-directional winding mechanism (as I am sure you know already 😀)

Archer
In this case it doesn’t matter if the watch is fully wound or not. The 7750 only winds with the rotor moving in one direction, and in the other it has no winding, so should spin freely. The fact it is jammed up means it needs to be looked at.

My SWAG (scientific wild ass guess, if you are not familiar with the acronym) is that there is a screw that has backed out of the automatic winding bridge, and is catching on the underside of the rotor.

Cheers, Al

Archer · Jul 10, 2021

Geezer
You are right, except that it's not a 7750. I'm not that familiar with Sinn models, but in the video it looks like a 2824-2, which has a bi-directional winding mechanism (as I am sure you know already ).

Yes, you are correct. I was somehow thinking that the 104 was a chronograph model.

Edit to add - it's a 2836 actually, with the day and date.

dsio · Jul 10, 2021

Archer
Yes, you are correct. I was somehow thinking that the 104 was a chronograph model.

I did the same initially because of the PAM 104 giving me crossed wires, too many watches with similar references

Archer · Jul 10, 2021

dsio
I did the same initially because of the PAM 104 giving me crossed wires, too many watches with similar references

Indeed - this is my PAM 104...

Foo2rama · Jul 10, 2021

Archer
Indeed - this is my PAM 104...

How is that a 7750? where is the chono? Totally in house!

Longbow · Jul 10, 2021

Just had a look at my Sinn 104 St Sa purchased circa 2015. Rotor swings freely in both directions when fully unwound and a little less smooth when fully wound (hasn’t been worn for about a year I guess).
The movement is a Sellita SW/220-1
Yours definitely needs servicing.

Archer · Jul 10, 2021

Foo2rama
How is that a 7750? where is the chono? Totally in house!

It's a mystery mate...😉

ghce · Jul 11, 2021

Unfortunately with all mechanical devices they need maintenance ie a service, I always build this into my purchases even if the movement is working 100% to specs.
If I was in your shoes I would have my WM evaluate it, it may well be that a service will sought the problem or at worst a part may be required but that's what you get him to quote for, if its a part required pass that back to the seller for either payment of the part or an agreed part payment ignoring the service cost as you are up for that on any mechanical watch purchase to be fair.

RubenDhae · Jul 11, 2021

I went to two watchmakers, and they quoted between 35 to 50 euros and 60 to 70 euros. I feel that this isn't too bad conisdering the 1k value of the watch. The original purchase from the original seller dates from 2017.

RubenDhae · Jul 11, 2021

The above quotes are for maintenance (i.e. complete disassembly, cleaning and reassembly) of the momevent. I believe this would fix the rotor issue? Ofcourse of a part needs to be purchased the cost would increase!

Stripey · Jul 11, 2021

I bought a Second hand Sinn I knew had a fault, and sent it off to Sinn to get it serviced. It was out of warranty. It came back from Sinn like new. No charge. They are extraordinary.

Sinn 104 from Chrono24, but a rotor issue (?)

RubenDhae

hronists

hronists

RubenDhae

dsio

Foo2rama

Geezer

hronists

Archer

Geezer

Archer

dsio

Archer

Foo2rama

Longbow

Archer

ghce

RubenDhae

RubenDhae

Stripey

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