These are NOS brake front wheel cylinders for all of the models and years listed below. These are original NOS Mopar pieces in their original packaging if available. Expect some patina [surface rust] from storage.
3633852 & 3633853
1972, 1973, 1974, 1975, 1976, 1977
W200, W300, WM 300 Power Wagon WITH 12 inch by 3 inch brakes.