This.
Series 70 and Series 80 are Colt trademarks. Series 70 designation hasnothing to do with the fire control group, even though it's come to allude to the fact that the pistol doesn't have a passive firing pin block/safety.
Series 70 meant/means that the gun was equipped with a collet bushing and the patented Accurizer™ barrel.
Thus, there is no such thing as a Series 70 Springfield, Kimber, Rock Island, etc. Neither is there any such thing as a Series 70 Commander or Combat Commander. All Series 70 Colts were 5-inch guns...Gold Cups and Government Models.
And there were a few early Series 80 pistols...mostly Gold Cups...that had the Series 70 barrels and bushings. Colt has never been known for wasting perfectly good parts on a technicality, so I suspect that this was the reason for the Series 70/80 hybrids that are occasionally encountered.