Interesting thread
https://www.shotgunworld.com/threads/u-s-single-barrel-shotgun-identification.447782

There is nothing on the back

[Linked Image from photos.smugmug.com]

I came across this postcard that appears to be dated 1884 which would be before the rebuild of the front of the clubhouse

[Linked Image from photos.smugmug.com]

[Linked Image from photos.smugmug.com]