This is a 1929-1930 Cord model L29 timing chain adjuster assembly part number A6-5011 as described in the L29 Cord Factory Parts List.  It is complete with everything shown as well as the proper tensioner spring in place on the back of the assembly.  

While this part appears in good condition, it is however an 87 year old service part and as such is sold without warranty.  

Thanks.