That is really neat, Vick. 
It looks like a much different style, than many of the more common types of recruitment material, from that era.
Is there any significance with the cat, in reference to the tanks or something else?
Thanks for the interest folks! Thanks also for the question about the black cat as I turn to the amazing folks at usmilitariaforum.com to learn something and share it here :
When the Tank Corps was established as its own entity in March 1918, it adopted the motto "Treat 'em Rough" (from a popular slogan of the time, "Catch 'em young, treat 'em rough, tell 'em nothing." When the Tank Corps set up recruiting at the New York City Public Library on Fifth Avenue and Forty-Second Street, they had a mechanical bobcat on the top of a mock-up tank as attraction.
The recruiters decided they wanted a black cat for the mascot and for an attraction to be held at Century Theater in NYC. They offered a $2 reward for a live black cat. Only one kid showed up with a cat
While the Tank Corps recruiters were at the NYC Public Library in September 1918, An artist, Gustav W Hufal, made crayon sketches of the type of cat the boys wanted. He drew a picture of a soldier holding the only cat entered.
According to the New York Times article, "While the sketches were being made, the mechanical cat on top of the small tank was kept arching its back and waving its tail while the make-believe gun on the tank kept rattling away to the great satisfaction of the crowd."
The soldier whom he drew was none other than Sgt Guy Empey, the Canadian who wrote "Over the Top." After Empey left the Canadian Army, he joined the fledgling U.S. Tank Corps.
