maybe 100
50-500 depending on specifics
Impossible to answer without a DETAILED description of ALL markings, barrel length, sights, caliber, accessories, box, papers, etc..
20-200 USD or so
Model 765 was in production from 1948 - '52.
.32 caliber
Possible.
sietecientos sesenta y cinco
The square of 765 equals 585225. The cosine of 585225 equals -0.70710678118707 for your answer. Hope I helped!
This site will explain how to strip your pistol. http://www.thehighroad.org/archive/index.php/t-129970.html
$175 if in good condition
50-100 or so