A Maxim one-pounder at the Royal Armouries is identified as a predecessor of the two-pounder pom-pom. The discussion describes its First World War use as a heavy machine gun. This museum example connects the later naval weapon with an earlier automatic-gun design.
Notable Point · 2:51:10-2:51:28
The Maxim one-pounder and the pom-pom's ancestry
A museum example connects the Maxim one-pounder with the later two-pounder pom-pom.