Armscor is series 70.
Not marked, normally means no needless parts. (No FP safety)
Retract your slide, and look under it at the rear. Is there a little round plunger in it? If so, you have the lawyer-inspired, basically pointless, and downright silly FP safety. If not, you have a normal 1911. (Pre-80 is more accurate than saying series 70.)
Steve