Thank you bilko, this will be my new beater too.
Actually i got it doubts when i was comparing with your card 😁
The watch itself looks pretty to my knowledge, everything is fine, not yet open the case back though. My speedy fois will probably have to stay in the box for a pretty long time 😀
Hopefully someone has information about the card 😁
This one has finally been united with a stainless steel bracelet. I've been quietly looking for a couple years, but finally managed to find an unused example that still had the plastic covers on at a great price.
Really curious that your one says 18 jewels, whereas mine says 17 jewels, despite being from that time when the 861 was using 18 jewels. It's not quite clear why Omega did this, however it was seen in other references as well around that time. I am guessing they continued to use the old 17 jewel plates while they were in stock, suggesting your 861 was one was one of the very last made.
The 861 was originally 17 jewels, however they switched to 18 jewels at some point in the 1990s I recall. I believe all of these were 18 jewels, however all the examples I've seen to date have been marked as 17 jewels. All of this was in the lead up to the 1861.
The 18th jewel is visible, but I gather of little real benefit and one might even suspect it was added more for marketing purposes.
There was an earlier thread where this was covered:
https://omegaforums.net/threads/861-movement-in-a-4835xxxx.82387/#post-1058764
I just Googled it and the top result said:
"The Omega caliber 861 is based on a Lemania movement, just like the 321. What is unique about the movement is that it uses a cam / shuttle system for operating the chronograph, instead of the more common column-wheel structure. The movement used 17 jewels until 1992, and from the year of 1993, it used 18 jewels."