numbers stamped into it it just in front of the swing arm that says T500. That is followed by a 5 digit number that I would assume is it's VIN.
Gimme the numbers, bud. My 1970 T500R was 33126.
PJ Honda XL1000V, Suzuki DR650, Adventure Royal Enfield, OSSA Explorer, first model XL250, 11 other offroad, road, and roadrace bikes