123K serial - Tudor 76100 Oscillating weight/rotor not signed

[tekno]

I have a 1984/85 Tudor Sub 76100 that we are servicing, My watchmaker told me it looks like it hasn’t ever been serviced.

The rotor/weight just has gold writing on it that says “25 jewels blah blah” but no Tudor logo/not signed Tudor. The movement is definitely a tutor ETA. Did any of them come without the logo?

Check out my bracelet waiting for the watch when it returns



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[Dan S]

Any sign of rotor-rub on the plates under the rotor or the inside of the caseback? Just wondering why it might have been replaced.

[tekno]

Both, rotor and inside has light rub marks.




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[GTS Dean]

Made in China.

[tekno]

Originally Posted by GTS Dean

Made in China.

What’s made in China? It’s a Tudor signed movement, that has a standard ETA rotor.

Your comment doesn’t help me with my initial question.

[linesiders]

Your photos don't help answering your question. Need good photos of movement to give you an answer.


Here is what it often looks like

[tekno]

This is the best picture I have until I can remove the back once it’s home.


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[dhknola]

I am not an expert, but I see red flags: 1. bracelet engraving on Diver extension looks funky to me (again, I'm not an expert) and rotor engraving of 'twenty five jewels' is unlike other Tudor movements I have seen.

[blackbard]

I've had a few tudors that have been worked on by independents where parts have been changed. In fact, I have a 76100 with the proper movement, and the automatic bridge was changed during a service removing the Tudor designations. All of the watch is original except that..

Not saying that's what happened to yours, but it could be.

[offrdmania]

Originally Posted by tekno

This is the best picture I have until I can remove the back once it’s home.


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That is just a generic replacement ETA rotor. Most likely replaced at a service by an independent watch maker.

[tekno]

Originally Posted by dhknola

I am not an expert, but I see red flags: 1. bracelet engraving on Diver extension looks funky to me (again, I'm not an expert) and rotor engraving of 'twenty five jewels' is unlike other Tudor movements I have seen.

FYI that bracelet came from my local Tudor dealer. It’s NOS.

I’m not questioning the authenticity of the watch. I just had it serviced by a pro... he said this isn’t the first time he has seen a plain eta rotor on a Tudor eta movement of this era watch. I was just curious if this could come like that from the factory or not. That’s the only question I had.






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[tekno]

Originally Posted by offrdmania

That is just a generic replacement ETA rotor. Most likely replaced at a service by an independent watch maker.

Thank you. This is what I assumed. Now I need to find the right rotor.


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[offrdmania]

Originally Posted by tekno

Thank you. This is what I assumed. Now I need to find the right rotor.


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Im just going off of the crappy picture. You need to post better photos because that movement may still be fake.

[dhknola]

Apologies on the bracelet call out; that is actually an amazing bracelet!
Sometimes when something seems 'too new' it's a red-flag, but wow, that is just NOS.

[linesiders]

Originally Posted by dhknola

Apologies on the bracelet call out; that is actually an amazing bracelet!
Sometimes when something seems 'too new' it's a red-flag, but wow, that is just NOS.

Hahaha ; ) - Recently picked up a NOS Rolex 93150, it runs my 61 PCG now

[scurfa]

I think it’s just the rotor that is wrong, it’s common for the rotors to wear and a normal eta one will fit, the previous owner might of been happy with this repair, a lot of Tudor owners bought the watches because they were cheaper than the Rolex equivalent so would never pay for services.

I buy a lot of them and it’s common to find them with no service marks.

Nice bracelet pick up, I bought one from Rolex UK and they told me it was the last one they had.


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[tekno]

If the movement was fake I think my watchmaker would have caught it, he said the movement looked to never have been serviced which is why I suspected the rotor to possibly be original. He tried to buy the watch from me too... which proves nothing but I just don’t see this being a real case/dial/hands/crown etc etc and have a fake eta.

I know everything else is legit, I just have never seen the movement myself. I got it back from a fresh service and will buy a case opener to pop it open and see.

The bracelet is awesome, since I am going to wear this watch more often than my other watches the non folded link bracelet makes sense.

If any of you guys have a Tudor Sub without a bracelet, you should go to your Tudor dealer and price one of these 78500’s. Smoking deal.




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[tekno]

The mystery of the missing rotor - as promised here is the movement of my 76100 with the wrong oscillating weight.




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[uncleluck]

I’d imagine it’s just been replaced rather than coming that way.

When the bearings wear the rotor can hit the movement, the circled below shows where it’s rubbed on the edge of the balance cock and plate. Most likely just replaced at a previous service early in it’s life.. Doesn’t look to be excessive amounts of rubbing and I guess it doesn’t mean it had to have been serviced when it was done (if your watchmaker is somehow sure it wasn’t serviced)




Edited to add...

Lovely watch though.

Zooming in on your hour hand it does look like the lume has started to crack, he may have let you know or stabilised it but encase he didn’t might be worth checking so it doesn’t fall out!

[tekno]

That’s actually what it was at the watchmaker getting repaired. It cracked and fell out. It’s finished again, and coming home.


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[77T]

Nice lollipop and I wouldn’t waste my money on a new rotor mechanism over some logo missing on it. That is, as long as it functions fine.


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[harry in montreal]

Funny. Back in maybe 2011 I bought a 76100 from a nice guy in Washington state on eBay. It did badly because the rotor was generic. The movement was orig but the rotor was swapped. Anyway, I sourced one on eBay, and had my watchmaker install it. I he managed to use the nice new bearing from the generic in the correct rotor. Something to think about when you buy an old rotor with toasted bearings