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Help on identifying this SOB T.3 with a very special case

P
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Hi Guys...

My very first post here..I've been collecting watches for many years. I purchased this Omega watch in a watch lot. I've have a lot of trouble finding info, especially on the watch case style.

And I'm also curious if there's any value in this. Movement is complete, but needs a new mainspring. Heavily patination on the dial, but case in good condition. Any info will be very much appreciated.

Kind regards / Peter

20250921_143922.webp 20250827_151422.webp 20250827_151419.webp
 
mac_omega
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If I remember correctly, this model is illustrated in the AJTT book - take a look there...
 
P
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mac_omega mac_omega
If I remember correctly, this model is illustrated in the AJTT book - take a look there...
Hi..thanks for your reply, unfortunately I don't have access to the AJTT...
 
mac_omega
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P prj
Hi..thanks for your reply, unfortunately I don't have access to the AJTT...
Well, then I guess I will have to do the homework for you and pull out the heavy monster AJTT despite of my sore back...
Here it is:

CK 616.webp

It is taken from the German version. If you don´t speak German here is the info contained in the text:
Unusual case construction.
It has a cal 23.7 SOB T3 inside - later it was also equipped with cal 23.4
Your specimen seems to have the dial execution visible in the small foto.
It is a pity that the dial on your´s is so badly damaged.
Nevertheless enjoy an uncommon early piece from Omega´s rich history.
 
mac_omega
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I want to add:
The dial shown in the larger photo is reprinted for sure (without mentioning in the text as usual...) - has a completely wrong Omega logo (much too modern).
 
P
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mac_omega mac_omega
Well, then I guess I will have to do the homework for you and pull out the heavy monster AJTT despite of my sore back...
Here it is:

CK 616.webp

It is taken from the German version. If you don´t speak German here is the info contained in the text:
Unusual case construction.
It has a cal 23.7 SOB T3 inside - later it was also equipped with cal 23.4
Your specimen seems to have the dial execution visible in the small foto.
It is a pity that the dial on your´s is so badly damaged.
Nevertheless enjoy an uncommon early piece from Omega´s rich history.
Thank you very much, it's indeed very much appreciated. I do speak and read German, so no problems in reading the text. (Sorry about your back)..

I agree, it's a shame with the condition of the dial, somehow the blued hands are very well preserved (doesn't show on the pictures).

Best regards

Peter

20250921_142848.webp
 
watchyouwant
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Looks like the typical silvered Dial Patina. You can't really make it worse, so ... If you brave enough , do the following: Buy some Silver cleaning solution for Jewellery . Dismantle the dial. Use plastic Tweezers and grab one dial foot with them. Have a small Espresso cup with Luke warm Water next to the cleaning solution. Dip the Dial and emerse in the solution. Direct out again and drop into the water to reverse the cleaning solution effect . Inspect the dial front while in the water. If the patina has become lighter, it works. Repeat another time , but do not expect too much ; because rather stop before the writing gets affected. It's a very fine line before that happens. If you found the right balance, leave the dial in the water and fetch a Hairdryer with variable speed . On "Cold" you start . Grab the dial foot with your Tweezers and blow the water drops on the front of the Dial off on low speed. Then setting to warm, but not hot and dry the Dial only from the back ... One swift slow speed front blow and then only finish from the back. Good luck !
 
P
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watchyouwant watchyouwant
Looks like the typical silvered Dial Patina. You can't really make it worse, so ... If you brave enough , do the following: Buy some Silver cleaning solution for Jewellery . Dismantle the dial. Use plastic Tweezers and grab one dial foot with them. Have a small Espresso cup with Luke warm Water next to the cleaning solution. Dip the Dial and emerse in the solution. Direct out again and drop into the water to reverse the cleaning solution effect . Inspect the dial front while in the water. If the patina has become lighter, it works. Repeat another time , but do not expect too much ; because rather stop before the writing gets affected. It's a very fine line before that happens. If you found the right balance, leave the dial in the water and fetch a Hairdryer with variable speed . On "Cold" you start . Grab the dial foot with your Tweezers and blow the water drops on the front of the Dial off on low speed. Then setting to warm, but not hot and dry the Dial only from the back ... One swift slow speed front blow and then only finish from the back. Good luck !
Thanks a lot for the very detailed instructions - well worth a try. I'm comfortable working on vintage watches, so I'll definitely give this a try. Very, very careful😉

I need to replace the mainspring as well, so I'm going to dismantle it anyways..

Thank you!
 
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