M7, Bulova, Roman Numerals used on face, wind wheel seperated into two parts, will wind but it will not function.
The stamped 2597 is the Bulova Case#. I looked this up in my crystal catalogs and found that the GS CMS798-50, 24.1mmx24.1mm crystal fits the Bulova Model #'s 03923 and 03924. I cross-referenced this to a BB CMS2410 crystal but it didn't provide a model name either. Maybe someone can find a model name(s) for the 03923 and 03924.
*EDIT* The earliest crystal reference I found was in an Oct 1966 BB Supplement. The BB crystal first appears in their #40 catalog. The GS crystal is not in their 1965 catalog but is in their catalog #100.
I wonder if this could be a Counselor variant. Geoff's Counselor C has a hang tag with the
model # 03918, 10CL 17j movement and is very similar.
http://www.mybulova.com/watches/1966-counselor-c-1763
*10-01-12 Spelling edit*