Omega Seamaster 120 vintage 166.027 Help!

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Hello Omega Community,

This is my first post so please let me know if I do any wrong or should be posting this somewhere else.

I have vintage Omega Seamaster 120 I was gifted by my grandfather when I was young. He has since passed away and I want to wear it. I was hoping to gain some more insight on its authenticity. I had the case back opened and noticed it has been serviced at least once in 1997 according to a marking on the inside of the case back.

17 jewel, 563 caliber to avoid tax on higher jeweled watches

Upon inspections I notice that the crown is not original and the bracelet fits with the 1968 production year that I was able to determine using the serial number. Though I feel it may have been changed out given the missing “1069” marking commonly found on that bracelet. Instead it has the No. 12, Omega, and says stainless steel.

The dial is in extremely good condition and I even notice some tritium lum that may still be present. I have had this watch in my jewelry box for the past 15 years and it sat in his for a number of years prior.

I was hoping anyone could provide some help on whether it seems authentic or provide some piece of mind on my theory regarding the changed parts during the servicing.

Any insight helps, thank you.

I also have struggled to find a link to make the bracelet longer. It is sadly too small because I have a slightly larger sized wrist. I can get it on but can’t close it. I’ve checked eBay, chrono24, and a few other sources. Swatch group wanted me to buy a whole new bracelet that doesn’t have the lines.

regards,
Jay
 
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Nice example, to me it looks original. also the bracelet is ok, I assume this watch come from USA so circled 12 on the clasp is ok..
About the crown, probably it has been changed but I would ask you to post another picture.
 
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Nice example, to me it looks original. also the bracelet is ok, I assume this watch come from USA so circled 12 on the clasp is ok..
About the crown, probably it has been changed but I would ask you to post another picture.
Hello flat-9000,
Sorry I did not see your comment. It seems I accidentally posted this thread twice but you are correct I am located in the USA and from my research the 17 jewels and 563 caliber aligns with the USA release. Your comment helps support my research. Thank you for your comment and input.
 
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Nice watch and cool story! looks original to me, enjoy wearing it.
Lots of fakes around, if you want to compare yours there is a great thread:
https://omegaforums.net/threads/my-...ers-what-to-look-for-and-what-to-avoid.38032/
Hello 321Only,
Thank you for your comment, it appears I accidentally added this thread twice. It was not loading and I didn’t think that it actually posted to the forum so I tried it again. Thank you for adding the link to the other thread so I could make some comparisons.