BUCK 5″ 3 Jaw Lathe Chuck No. 431 Self Centering

This is a BUCK 5″ 3 Jaw Lathe Chuck.  No. 431.  The Jaws are Self Centering.  It has a 1-1/2-8 Mounting Thread. It has been used and has some wear but overall is in good shape.  Does not come with key.