pottery jar vase, geometric design in relief, dragon or horse motif

Earthenware, or terra cotta, or red clay pot (jar or vase?)  Has 2 handles that are applied, but the rest of it looks like it is turned on a wheel.  The design around the middle looks like little dragons or horses (?) The other designs that circle it are cut into the pot, but the horses (dragons?) are in raised relief.  The designs circle the entire pot.  About 6 inches tall by about 6" across at the handles.  Inside looks like terra cotta.  On the bottom is stamped the letters:

RCK 

Curious to know what it is, where from, is Native American or?  Approximate age And value. Curious about it.