In looking at the Wikipedia entry under the book's title, the following is stated:
"After Wilson's death in 1900, the plates and copyright were inherited by his heirs. Charles Taze Russell, then president of the Watch Tower Bible and Tract Society, approached Wilson's family via a third party and obtained the copyright, and at some later point, the plates. The Society published the Diaglott in 1902, and later had the type reset for publication on its own presses in 1927, with an additional printing in 1942."
Therefore, I would assume that your edition was published by Fowler & Wells in 1902.