This is a new AUTOLITE OVERDRIVE  RELAY .   It is an OEM NOS AUTOLITE RELAY, not an aftermarket replacement.  The part number is RAG4001 (9-31), the CHRYSLER (MOPAR) number is 1692694 , it is in group # 21-69-2 of the CHRYSLER (MOPAR) parts catalogs . It is unused and has been on my warehouse shelf since it was purchased from AUTOLITE. The part  is stamped RA4001 on the cover.

According to AUTOLITE  It  fits: 

1956-1957 CHRYSLER PRODUCTS STANDARD TRANSMISSION   & OVERDRIVE

1962-1963 CHECKER STANDARD TRANSMISSION   & OVERDRIVE

According to CHRYSLER (MOPAR)  It  fit:

1955-1959 CHRYSLER (MOPAR)  w/ PRODUCTS STANDARD TRANSMISSION   & OVERDRIVE

     

The part number may have been later superseded to fit other models, but this is the only correct application in the original listings.