Yup, I replaced the short trigger and "cleaned up the trigger break" but I can put the short trigger back in.What filson said is correct. With the pistol you pictured the trigger and grips have been changed by a prior owner.
This 70G has the collet bushing!The barrel and collet together made up the 'Accurizer' set-up. The special barrel is frequently overlooked but is critical, because it was machined behind the muzzle to a smaller diameter so the gripping fingers of the bushing could relax, allowing for easier manual cycling of the slide.
The original Series 70s were distinguished by the collet barrel bushing and matching barrel with a slight step-down behind the muzzle as 1saxman described. A lot of people don't realize that the collet bushing system wasn't discontinued until around 1988, so early Series 80 pistols have it as well. The current trend of calling any 1911 w/o a firing pin safety as a "Series 70" probably began when parts manufacturers like Wilson Combat and Kings Gun Works had to distinguish between parts they made for Series 80 models and Series 70 and earlier, like firing pins and extractors. Eventually everyone started calling anything w/o a FPS as Series 70, which was technically inaccurate. Unfortunately even Colt rolled with it and now calls all their pistols w/o a FPS Series 70 models.Didn't the S70s also have the Accurizer barrel that went with the collet bushing?