How many people have ever seen a S&W Mod. 10 in .357(always a .38 cal. gun). It is marked inside the crane MOD.(over)10-6. It has a 4" heavy barrel. It is bearing serial no. D6058xx. On the right side of the barrel it is marked "S.&W.357 Magnum". I have heard that these were New York State Police guns from the early 70s but that is all I know. Anyone know anything about these guns? Thank you.