Nope. Standard American shank. In fact, I got a couple of Perantucci mouthpieces for it and had the shanks turned down by Kanstul.
By the way, I made my own wraps for it out of leather I got from the local Tandy store. It's easy enough to do if you take your time and make templates out of paper or just do careful trial and error. But good leather is surprisingly expensive (especially if it's a bit thicker than most of the wraps commercially available).
Gary Merrill
Wessex EEb Bass tuba (DW 3XL or 2XL)
Mack Brass Compensating Euph (DE N106, Euph J, J9 euph)
Amati Oval Euph (DE 104, Euph J, J6 euph)
1924 Buescher 3-valve Eb tuba (with std US receiver), Kelly 25
Schiller American Heritage 7B clone bass trombone (DE LB K/K10/112/14 Lexan, Brass Ark MV50R)
1947 Olds "Standard" trombone (Olds #3)