I was wondering if these four guns, considering they were shipped to the SS Prince George, was a joint venture of Ithaca and The Dominion Cartridge Company, to shoot trap off of the ship to demonstrate the superiority of the gun and the ammo to the wealthy passengers. Any thoughts on the feasibility of this idea?

How does one explain the Cody letter having the gun finished in Sept., 22, 1915 and ordered in Dec. of that year ? These were special order guns with the Beaver motif.

I was thinking about that and figured that the gun was finished before the order was received but a new floor plate was engraved and installed with the Dominion Cartridge Company trademark as requested.

Any connection to Boa on 99% of Ithaca letters refer to his position as an Ithaca sales representative. He was a high average shooter with probably more than one Ithaca single, but his name was associated with hundreds of Ithacas. Boa's name is on the original order for my Sousa Knick, which he took to the 1930 Grand American with a bunch of other guns. He sold the Sousa, apparently at the Grand.

You could be right. In the past, I have received a Cody letter on a gun that differed from the one I asked for. I guess the 1910 Ithaca trap gun delivery date in another post is questionable.

We don't have any proof laws in Canada. We're basically the same as the U.S.. As far as I know all have to be proof tested before sale or ownership transfers in countries with proof laws, but I'm not sure if a personal gun brought in when moving needs to be tested. The use on passenger ships sounds plausible.