Hey RDS,
That’s a handsome watch that you are considering. I like it.
The Omega f300 movement was made under license to Bulova by Ebauches S.A. During the 70s a number of Swiss manufacturers added tuning fork watches to their lineup. They all carried the same ESA movement save a small insert bearing the appropriate manufacturer’s name and possibly a serial number.
Hence it is important to visually check the insert to verify that it bears an Omega signature and serial number. The movements are interchangeable and it is possible that any given f300 watch may have had its movement replaced during service with one from another brand.
Not that a movement swap would render a watch nonfunctional, but it would dilute its originality and value.
Speaking of value I found a watch on eBay similar to the one that you are considering. See
HERE. It sold on 8 April of this year for $385. Just throwing this out as food for thought.
These Omega f300 watches generally don’t command the same price as a similar automatic Omega of the same age and condition. Don’t ask me why. They just don’t. Maybe they are too quirky for the Omega purists. I don’t know. But I do like them and own one myself.
The price of an item is what a willing buyer and seller agree upon. I hope that this post gives you a bargaining chip and you can land a good deal.
Let us know how it works out.