sterling fish with mystery mark

[dwma]

Articlulated fish, 4" long. Marked MRT on fin; plus 925 and tiny touchmark on tail.
Any help with the touchmark? It looks like: 1 - ????? - crescent
I thought this might be Mexican. But probably not. Maybe Spanish? Egyptian? I am totally unsure.

[AG2012]

Hi,
Hungary import mark for sterling silver 1966 - 1999.
Regards

[dwma]

Thanks!