I'm gonna say repop because Ive never seen any quite like those. They have 1" blocks, so they're 10s. Smaller blocks (3/4?) would be on 8s. All 4 inch pedals. The thing about the seam, as I understand it, wasn't the lack of one but the fact that the seam was locked together with little tabs and slots on the real thing. If they don't have those little lock tabs in the seam, they probably aren't from back in the day. Black set on the left is probably vintage, but a closer look would be needed.