I believe they called them "Punt Guns" and were mounted on the bow of the boat and meant to be used to water swat resting ducks at night.
That's what I was trying to say Above^^^ Thanks 160
I read and saw pictures of some brothers finding their Grandpa's 4 ga. In Outdoor life 20 30+ yrs ago .
Funny photos they had.but definitely meant to be in the wooden gun mounts.