Raimey , I agree with your hypothesis on the "left over" guns. The war did not stop production of guns destined for America from Germany at the exact moment all guns were complete and ready for shipment. Many must have been partially done and then finished after the war. We see this in British guns, too. A Beesely I had was started in 1911 and completed over 10 years later. I think I remember seeing those Daly Trap Guns offered in the teens, then the offerings stopped. Later, in the mid 20s, as I recall without looking things up, the same trap gun models reappear, Sextuples and others.