Hi
I have previously determined that I want an LCD Quartz, a tuning fork (F300) and an early Quartz (Megaquartz K32 KHz) Omega in my collection. I think it's an important part of history and fun to have.
I have just picked this one up to day.
The clock seems almost unused and there are almost no signs of wear and everything works perfectly.
BUT clock exist apparently not in Omega's archive, in each case I cant find the reference , or find a similar in the Omega vintage archive.
There is also Seamaster logo on the rear case, but it seems original enough.
If anyone has info ,it will bee received with joy, I must start with the big book and google now!
Omega Speedmaster Professional Quartz
Ref. 186.0004
Cal. 1620
Movement.no.
39584472
Ca. 1976
Best
Thomas







I love it too!
Found the ref. in the big book page 617, and a few others on Google.
I was wondering if it is rare, i can see the cal. 1620 was made only in 52.000 pieces.
Best
Thomas

Yes, it's a good find Thomas - lovely!!
Cheers Andrew
i'll agree with Bill, its a great watch.
as for the F300 why not go for the Speedsonic tuning fork speedmaster. i had 2 over the years and they are also great pieces. several different variations available with the 'lobster tail' as the most desirable.
if you ever decide you want a Bulova original Accutron just send me a pm.
best
G
...I am still to move into my first Omega Quartz/LCD watch, but this would be something for me one day
Best
Hans