Not 3rd Generation grips IMO, as they don't have 'Colt's, Htfd, Conn' cast into the inside bottom edge of the panels.
3rd Gen grips are usually oversize ( when NIB and never fitted) however on a 1st gen gun by a portion of the outside checkering border. So they can be fitted carefully to the grip frame and still have a nice even border remaining and look nice.
1st Gen perhaps,,or maybe 2nd(?)
I don't remember if some or all of the 2nd gen HR grips had the cast in lettering in place.
A small chip out of the toe of each panels on the inside? or is that the pics..
Price diff/value betw 1st and 2nd is quite a bit