The Gulf Chemical Tank Car No. 6315 has four variations. Built between 1956 and 1958, the first two of these versions would have the BURNT ORANGE/BLACK coloring, a "BLT 1-56" date on sides, along with bar-end trucks and tabbed couplers. The other two variations would be produced in the last two years of the post war era, 1968-69, and these versions have a solid ORANGE tank with late AAR trucks and disc couplers.

Variation A: Hi-gloss BURNT ORANGE/BLACK tank with bar-end trucks and magnetic tabbed couplers.

Variation B: Identical to Variation A except Flat painted RED/ORANGE and BLACK tank.

Variation C: ORANGE tank that is not painted and has no built date. Came with late AAR trucks and was housed in a Hagerstown Checkerboard box with "6315 / CHEMICAL / TANK CAR" printed on both box ends.

Variation D: Same as Variation C except this variation has a built date.