I have a few more photos if needed.
Not sure how to access the rear of the movement.
Keeping "good" time at +109s/d
We are going to need more photos; I believe your dating is off due to the 6 digit case back s/n. A photo of the inside of the case back should show a 7 digit s/n that will indicate date. My initial guess is your watch is a 1933 to 1937 Ambassador, like this one..
Movement will have to be carefully removed from caseback. Don't pry against the dial or you will risk popping off and losing the seconds hand
No clue what the inner marking are, but if I am correct, this is a 1934 Ambassador?
In reply to No clue what the inner… by johnrbell
Hi Johnrbell. Your watch is not the 1934 Bulova Ambassador. I have no idea what it is but I see several discrepancies between it and the Ambassador. For one, the 1934 Ambassador had a crystal with straight sides. Two, the ribs on the ends of the case on an Ambassador do not have the concave indentations going across them like yours does. You've got something really interesting here.
In reply to Hi Johnrbell. Your watch is… by 1955mercury
Thank you! If there is anything else I can do to provide any details, please let me know. Otherwise, I think I'll just hang out and hope someone know what we're looking at.
In reply to Hi Johnrbell. Your watch is… by 1955mercury
In reply to https://mybulova.com/watches… by johnrbell
I think you are correct Johnrbell. And it's a more expensive Bulova than the Ambassador. Nice!
I'm a bit confused about the "21 jewel" movement, most look like 15 from this time?