Series 80 guns all have the firing pin safety, which can be seen if you retract the slide and peer under it and see the plunger there. Series 70 guns have no FP safety, but they did have a unique spring-steel barrel bushing that gripped the barrel like the fingers on a collet. Only Gov't/Gold Cup models were ever designated Series 70. The Commanders were simply pre-Series 80 until the FP safety was introduced. Guns made before the collet barrel bushing was introduced are known as pre-Series 70 guns and are the closest to mil-spec. All clone 1911s except for Para Ordinance are essentially pre-70 in design since they have neither the FP safety nor the collet bushing.