Tony M is correct. I do not have information for earlier years, but in 1954 the option 387 was clear rear corner windows on a Pick-up cab. An alternate option was the "Deluxe Cab" and that option (430) included several items including the rear corner windows. In 1954, the "Chrome" option (393) was a separate option (chrome front bumper, grill, and hubcaps). A rear chrome bumper was a separate option.
Tim
