That mold is made by Sun-Fly.
If you have the most recent Chip Chat Auction catalog #32, a Sun-Fly manufacturer sample chip with that mold is lot # 401.

I don't know if the lot has a name yet? Saito describes it as "a trapezoid joined to a rectangle" ... which is not a very helpful name, even if abbreviated to Trap-Rect.

Personally, I think it looks like 2 blackjack cards, as the dealers often place them in face-up dealt games. See pic below.
Maybe call it BJ-cards ???

Spragg has business relationship with Sun-Fly, so maybe he knows the real name for this mold.