1959 (L9) case with a 17 Jewel 11AF movement dated M0 for 1960. Very similar to the 1948 Brewster as seen in the attached photos. I'm not suggesting its a 1960 Brewster...I'm just pointing out it's exactly the same size and shape with minor differences such as the lugs and on the bezel at the crown. It will help in identification i think.
This is from a recently found set of adverts featuring several models from the never-before-seen SVP range, which stands for "Style,Value,Performance". As can be seen in the ad, it too has "17jewels" on the dial.
Only thing found before was a crystal packet with "SVP VI" on it, and a Registered Trademark,discussed in this thread:
http://www.mybulova.com/forums/bulova-svp-vi-what-can-stand
Variant not known, but these models seem to break from the normal way of naming variants, instead of a letter format, these use Roman Numerals, as in the "VI", or "VII".
Later these models were seen with different names, but in 1959-1961, ads for the SVP line have been found.