Thanks, folks:
With these suggestions I will do some squinting in good light. But the item mentioned by @NumiFan (1/4 kakini from the Naga dynasty) looks promising. This is partly because of a weight and size match, and partly because in the 2x2 I placed it in I can detect some raised dots pressing the plastic, otherwise not detectable.
These tiny worn coppers never make the "most wanted" coin lists, but I find them quite an ID challenge and numismatically very interesting.
Edited by oriole
02/11/2026 10:04 am