LOL. I had done some independent poking around, and ended up on the same coin at Wildwinds.
For comparison to some other Macrinus AE's from Nicopolis ad Istrum - obverses attached to different reverse types (at top - OP coin in center), then the same coin Kurt landed upon, for the reverse type with Harpocrates, below.

For comparison to some other Macrinus AE's from Nicopolis ad Istrum - obverses attached to different reverse types (at top - OP coin in center), then the same coin Kurt landed upon, for the reverse type with Harpocrates, below.






















