"Hydra-Matic Drive" Trunk Emblem Insert, 1947-50 Oldsmobile Trunk and tail gate 'Hydra-Matic Drive' emblem insert for all 1947 Oldsmobiles, all 1948 models except 98, all 1949 station wagons and all 1950 Deluxe station wagons equipped with Hydra-Matic transmission. Red background and silver lettering like the original, this GM licensed reproduction measures 5 3/8" wide x 1 3/4" high.