Would that serial number also determine whether its a number 6 or number 7 Also, does anyone know what type barrel that year of manufacture would have had Twist or the Armory Steel barrel The barrel on mine actually has a split in it, so Id like to find a replacement barrel. Ive know these guns are of very little value, but would like to know more about it and possibly semi-restore it, just out of sentimental reasons. Im just curious as to the approximate year of manufacture, and also any parts availability. The serial number is 151368 From reading the archives Ive learned all about the FolsomCrescent stuff and the possible issues with firing modern ammo in these old guns. Knickerbocker 16 Gauge Shotgun Serial Number Is 151368 Knickerbocker 16 Gauge Shotgun Serial Numbers For 1909.Knickerbocker 16 Gauge Shotgun Serial Number Is 151368.