I recently purchased a very very clean Marlin 322 on a Vixen action, SN 163x. It is a heavy barrel (not an un tapered 1 inch) but heavy with a slight taper to about 3/4 inch. It has the JM in a circle stamp right next to the receiver on the right side.Dull satin finish but the SAKO frame is normal high luster. No markings on the barrel what so ever. (not refinished) Also, inside the trigger guard toward the front, a lever about 1/4 inch extends downward. It is a set trigger lever. Gun has the normal white line Marlin butt plate. Is this an early version of the 322 , a proto type or what????

Bob