"70B" prefix mfg. 1981-83.
I have three "70B" prefix pistols. Two of them (70B399xx and 70B449xx) are Combat Government models mfg. in 1983. The other (70B108xx) appears to be a standard Government model. Until I came across this last one, I thought ALL of the 70B prefix pistols were Combat Government models.
Show us a pic of yours.
I have 70B543xx in full[read shiney] nickle.Joe Poyers' book pg.247 has dates broken down as follows:1981 70B00000 -72630B70-99999B70 to70S40479-70L25219 in 1981[change in serial # format started Oct 17, 1981] then: 1982 70B11247-70B47460 then: 1983 70B47461-70B56689 then changing again to FG1000-?[still in 1983. Hope this helps, Nick