Bulletin 1246, U. S. Department of Agriculture 
Plate XXX 
NO. Al OR PRiME AND No. I OR CHOICE STEER CHUCKS 
A, No. Al or prime steer chuck (rib end); B, No. 1 or choice steer .chuck (rib end); C, No. Al 
or prime steer chuck (shank end); D, No. 1 or choice steer chuck (shank end) 
