Not much, if any premium for the 1972 Std, over any current offerings. The NRA Endowment gun, a bit of a premium if minty, boxed etc to a collector of the MK I series guns. To many you'd have to post more details as to the features of the NRA one. (Special markings etc,) but those still only command a premium if the production numbers are low. There have been a few different NRA marked guns over the years & as such,, the devil is in the details.