Swiss 17 jewel 6BK (B almost looks like an 8) movement. J9 date symbol on movement. A9 date symbol on case back. White and yellow gold Filled case and case back. Speidel expansion band with diamonds or crystals. Bought this one so the Mrs. Can join in on the fun.
I see Margo in the advert from 1948 but I'm not 100% sure I see a match. The ad appears to show engraving on the sides of the bezel? Is your case two tone yellow and white?
http://www.mybulova.com/sites/default/files/vintage_ads/1948-Bulova-ad-…
1948 ad snippet and subject watch.
Close, but not a match.
Hi again Wangbow. I believe your Mrs. is the proud owner of a 1949 "Martha Washington." This ad is from 1950.

In reply to Hi again Wangbow. I believe by 1955mercury
Looks like a match to me. Thanks!
Now that looks like a match! I'm good w/ 1949 Martha Washington ID. Good ad match merc.
Nice find on the ad, I would agree with Martha Washington from 1949
+1
Yes, that looks more like Martha Washington