Just weighed some for reference.

Early 50s 37 28” 20 gauge 6#1oz including the 1” Decelerator
Early 50s 37 26” 16 gauge 6# 2oz
90s??? BPS 28” 20 gauge 7# on the nose

And for the fun of it, while I’ve got the safe open, grandpas late 50s Model 12 12 gauge, 28” , 7# 7 oz