correct center caps for a 72?

[pttsls5]

I have 2 sets of center caps.One cap has 3925805 GW 552504 ( HB in a hexagon) and Canada stamped around the center with 2 79 near the center. The other has 2504 directly in the center with K.D. below this number and 2 79 around the center edge. Which one is correct for a 72. Are they both original GM just different years of production? Or reproductions for GM? Thanks for any help!!!