Plymouth paint codes were often hidden on top of the radiator support, hard to spot under engine grease and oil. Later models started putting them on the drivers door jamb. Typical code format appears as BS/GBS, but only the BS is the color code; variants like QBS, PBS, TBS may appear. BS corresponds to Deep Water Blue Pearl Clearcoat. The G in GBS is not part of the code, and newer listings may simply show BS.