Art Magic: A Bibliographical Note

In an earlier post, I noted that there are two cover variants of the first edition of Ghost Land: an edition with blue boards, and an edition with red boards.

It now appears the same is true with the first edition of Art Magic.

Here is a shot of my first edition of Art Magic, in red boards, and deliberately designed to be visually consistent with the first (red) edition of Ghost Land:

And here is a first edition (currently for sale by owner -- contact me if you're interested in owning it) of a first edition text (same title page, for sure, same cover stamping, and presumably same text) in green boards:

I had speculated that the difference, with Ghost Land, was the country of origin: blue for US, red for England. Maybe that's dead wrong, and maybe I got it backwards.

A green boarded Ghost Land or an Art Magic in blue boards would open up yet another vista.

A bibliographical puzzle, for sure.