Original Parker 0 Frame 16 gauges are built on a “20 Ga.” frame.
I have a Parker reproduction with the 20 gauge factory barrels and the 16 gauge Kreighoff barrels and can confirm that both the reproduction and originals used 20 gauge frame.
You and I have the same Reproduction set...Very few of them got out....
As far as original Parkers and the 16 Gauge; while some were made on the 20Gauge frame, others were also made on a larger frame.
