Fantasy Issue?

Hi, I'm just going through a number of unattributed coins in my collection and trying to identify them. I think this one is likely a fantasy/replica issue out of Thailand, but thought I'd ask what anyone else thinks. The rev is Arakan, Burmese Era 1140 (1777), Sanda Thaditha Dhammarit (an example is here). However nearly all Arakanese pieces I've seen have the same script on both sides and only crude images if any. The piece is not magnetic and clocks in at 11.87g and 24mm across (it's maybe 2.5mm thick in most places).