This is a new rear axle inner seal for Dodge Truck 1/2 and 3/4 ton built in 1947 and 1948. This seal is correct for:
1947 All 1/2 and 3/4 ton, WC and WD-15
1948 B-1-B 1/2 ton up to serial number 82068925
1948 B-1-C 3/4 ton up to serial number 83318900