THE SINGLE BEST STRATEGY TO USE FOR DAN WESSON HEAVY DUTY

I've found a few posts here about feasible dates of 1978 for serial numbers beginning in 16**** but I lately picked up a an old Pistol pack in the original brown Dan Wesson case With all the factory unpleasant yellow covering over the foam. Mine is the full lug model 357 and my serial number starts off off with 136*** and it has Monson, Mass stampe