Thank you everyone, this is very helpful! This is the watch I was looking at:
http://www.secondtimearoundwatchco.com/watches-for-sale/heuer/leonidas/8707

I'm still learning what the criteria is exactly that I'm looking for, which makes it difficult to post a WTB, but I will try to wrap my head around it and do as you suggest. Any thoughts on the link above? (Sorry, i couldn't get it to embed into the text)

Hello all,

: I'm a new member who joined recently to find a watch for my fiancé
: who loves old Heuers from the 1930s and 40s. I am very much a
: novice in this field and brand. Has anyone ever worked with
: secondtimearoundwatchco.com? The brick and mortar store is in
: Beverly Hills it seems, and they have a beautiful vintage Heuer
: chrono .... (Please don't go bidding against me!) I'm very
: nervous as a first time vintage buyer that I'm in over my head
: and am looking for a vendor I can trust to help me through the
: process. I'd love your feedback. As my fiancé said in passing
: (he doesn't know I'm on the hunt for a wedding present here), if
: you replace the insides of this watch, it's just not worth it...
: You might as well put a pinto engine in a Ferrari. I don't want
: to make a mistake for such an important gift!

: THank you!
: Danielle