I have a beautiful and in great shape older remington wingmaster 20ga with a fixed imp. cylinder bore. The gun does not have a letter prefix (in the pic it looks like the serial # has an "I" but thats really a 1 the serial # starts with 11) so from what ive read on the internet it was made before 1968 if what i read was true. $650text is best 918-2three7-98two8