help me with my P.08

O.K.so i goes to this nifty tech info section and I indeed find out something about some of the other markings that i thought were inconsequential. "42" and "byf" on top of chamber and toggle, respectively. Blackish finish on all parts w/ walnut checkered grips, so, "Black Widow" candidate or not and what does this info do to the value. This service is great!!WMB