russian shotgun
I suppose, not sure, only suppose that
TO 3 = TOZ is the factory, famous also for olimpic gun one shot 50 mt.
ATM 750 (phisic)atmosphere is the unit of measure of pressure in metric
system, as PSI. 750 is very low proof, pay attention at shotshells, loads no
more than 1 ounce, maximum 1 ounce and 1/6.
today in europe shotguns are proved at 1300, 1500 ATM
ciao, franco
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