This is the Sakai Signature Variant edition with a painted cover by Stan, no bar code on the back cover, and a lovely matte finish front and back.
This variant edition was created by Stan for sale on his website and is out of print.
From the publisher:
Revisit the critically acclaimed crossover comic between the Teenage Mutant Ninja Turtles and Usagi Yojimbo! This special extended edition comes with new features including the rare Mirage-era story The Treaty!
Written and illustrated by Eisner Award-winning Usagi Yojimbo creator Stan Sakai, this expansive hardcover offers extra behind-the-scenes features, including a new cover by Stan Sakai, an afterword by Stan, layouts, character designs, a pin-up, and a reprint of the very first crossover between Usagi Yojimbo and the TMNT.