Has letters M5 on the back, 10K rolled gold, on very bottom has small letters sw.?9
Your watch will be Data King variant "M"

Good ad match J. I'd agree with Date King 'M'. This is the only one I have found so far with that distinctive 12.
Welcome to mybulova Joenewman89. I really like the mid 60's dials with the "Deco Retro" numbers.
1965 Date King "M"
Good ad match, Jabs.
1965 Bulova Date King M
1965 Bulova Date King "M"
Thank you all for identifying this, it's a gift from my Grandad, he took it to have the battery changed years ago and he believes they swapped the strap without his knowledge. Does anyone know what it's value is today?
In reply to Thank you all for identifying by Joenewman89
Hi Joe, sorry to have missed your question. Unfortunately we are not qualified to appraise watches, there are just too many factors. If you asked my wife, she will agree as she thinks that I generally pay MUCH MORE for them than they're worth!
[quote=Joenewman89][/quote]