I think this caliber deserves a thread.

This small caliber from 1934 had a 60 hour power reserve, not beaten by any mechanical Omega calibers until the caliber 8500 from 2006.





I will start with mine:

CK 3516 - CK 891 and CK 921

 

Here is mine with an "unknown" movement version:



It is cased in a 14K pink gold art deco body.


The "special" is the movement:

It has 17 Jewels opposed to 15J commonly found and it has special finishing to the crown- and ratchet wheel and also to the pallet fork.
The latter is angled and polished.
This watch had been delivered to the US hence the inscription "unadjusted" on the movement to save on import taxes/duties as they were imposed related to the number of jewels...

This movement is believed to be a chronometer version due to the special finish although the inscription does say differently.

 

Beautiful -- all of them. Thanks for sharing such eye candy

 

I have 2 17 jeweled movements, but no cases

DON

 

Photos or it never happened

 

Thomas, Erich, lovely stuff.

This is of course deep in Yann territory. He is too polite to say so, but you couldn’t have a more extensive display than in his post in June (OK, not all of these FORTY are T17s, but most) …

https://omegaforums.net/threads/concerning-tanks.41385/#post-484341

 

Make me work why don't you

Quick pick



DON

 

Don,

as I can´t see the movements´ finish please let me know if they have the same high grade finish as the one I showed? (ratchet- and crown wheel, pallet fork)

regards

Erich

 

Hi Erich,

Standard movements, but have the added center wheel jewels

Picked them up as the prices were reasonable

DON

 

I have one that is being re done (dial). I love this very 30's watch. The movement is simple and effective. Yours are beautiful.

 

I have some 17 jewels T17, some with the 'standard' finish, at least one with the high grade finish. I wil post a picture this evening.

 

Here is the picture showing both finihes for 17jewels side by side.

 

Incredible, guys. Learned something new today.

 

Any idea why Omega would have spent the extra time and money to produce a 'high grade' finish on some movements but not others? It apparently did not take advantage of any chronometer ratings. The serial numbers are not sequential, so they must have made batches of high grade movements. Just seems odd to add cost without an obvious benefit...

 

For gold cases?

 

Companies would produced different grades of their movements for different markets and price points. You can find different finish/jewel counts on most pocket watch and wrist watch movements from that period from a major manufacturer.

 

OK, that makes sense. So the 17J movements were perhaps sold through the luxury retailers of that era. I imagine a wristwatch salesman might show off the finely finished T17 movement to a prospective customer in an effort to make the sale, just as they might have done with a high-end pocket watch.

 

Thinking that the 17 jeweled movements are near the end of this movements time?

Majority of watches or movements sold on Ebay tend to be 15 jewel. Very few 17 jewel. Wonder how many were actually made

DON

 

My T17's is in the 8.657.xxx-8.826xxx range around 1937 and 15 J movement



Maybe @mac_omega 's is one of the rare 17.2 S 17 p

 

Sorry but I don’t think there is any connection between the T17 and 17.2S – apart from being adjacent in the listings (the 17.2S is not a ‘tonneau’). And that’s why DON’s comment is interesting – we are given no breakdown of the variations within those 167,400 T17s.