Alan,
Here's a link to Frank Ward's Web site with a picture of a Cobb, and what is now Leon's McBride.
http://www.centuryoldcards.com/Uncataloged.html
And here's my Ainsmith, which is, sorry to say, not blue. It is 3.75 high by 1.75 wide. I picked it up off of eBay about a year ago, from another Washington collector.
As much alike as these three look, I don't think they're just a generic "catcher" pose. Look at the caps, the lines on the glove, and the way the socks and shoes are shown. I think the differences are more than what you'd see just from printing variation.
What's even more odd about Leon's is that McBride was a shortstop for most of his career--never played a game in the majors as catcher.
Bill