The Collector's Forum - Mosin Nagant HQ
(...and it's not Spam! :rolleyes: )
From some other sources, I've been able to speculate on the following interpretations, almost certainly Russian (if the "T" is for Tula), but still can't determine the exact cartridge, i.e., rifle or pistol:
7.62 ЦГЛ (?GL = brass case?) (Ц, pronounced "ts")...