Parker Bros. did so many weird and wonderful things to satisfy a customer's desires it boggles the mind. Some years ago, Jack Puglisi had this HEAVY 12-gauge built on a 6-frame, normal for an 8-gauge --
Normally 10-gauge guns were on a 3-frame, but we know of at least one 10-gauge built on the 1-frame which was normally used for the light 12- and heavy 16-gauges. One year when Kevin and I were doing the PGCA booth at The Vintage Cup at Sandanona, we had 20-gauges on the 0-, 1-, and 2-frames on display.