Win 70 pre 64's ended at serial 581xxx I forget the exact number. The push feeds started at 700,000. The G came about as a result of the Gun Control Act of 1968; all manufacturers were given a letter to be included in their serial number. The Classics are a serial number nightmare. I have seen 5 digit serial number Classics, i.e. GXXXXX. The G went away with New Haven.
