37mm Hotchkiss, 3 pounder slide gun, 5 inch naval gun (WNY)

Is it just me, or does anyone else read the 47 m/m on the breach of the revolver cannon? Wouldn’t that make it 3pdr? And the size kinda matches the barrel of the 3pdr in the first pix. Cheers, Bruce.

P.S. Vald, Thank you so very much for posting all of the pix that you do of your museum tours. It is both educational and VERY interesting!!!