choke tower reads " LIST -3310-1" and under that is "1293" im told the 1293 is the date code and 4 digit date code wasn't used until 1973. I see no OEM manufacture type numbers. I was trying to find out if this was a desirable carb with an OEM application but doesn't look like by the numbers im coming up with. Looks to be a universal 750 vac secondarys.