The picture below show larger front and back views of this Old Dorchester Massachusetts Chevrolet Dealership Advertising Premium Key Chain. This keychain is not date and the year that it was made is unknown. Appears to be made of brass or bronze. One side has the Chevrolet emblem or logo. It is marked on the two sides as follows:
CHEVROLET HURNEY CHEVROLET INC. 286 ADAMS STREET DOECHESTER, MASS. 282 - 8000
The keychain with the fob measure about 4-1/4'' x 1''. It appears to be mint unused condition as pictured.