Hi Tod, Allis Chalmers used two different shades of a color they called persian orange. The early shade was used until about 1960, after which the later shade was used. The name, persian orange, remained the same. The early one is similar to a pumpkin shade of orange in that it has a sort of yellowish, brownish cast to it. You will hear that sometimes referred to as "persion orange #1" on internet discussion forums. The later shade has much more red tint in it and is not a good match for the earlier version. As Jason says, the early pumpkin shade is matched well by PPG code number 60080. The later, redder version is matched well by PPG code number 60396. You can see a visual comparison of the two PPG shades on my website that Jason linked to. I use the 60080 on my '42B because I personally prefer that shade. Others seem to prefer the later version as being "brighter", regardless of originality. There are many different shades of orange from many different manufacturer's that are used on pre-1960 AC tractors by their owners. The one I think best matches the original color is the PPG 60080, with the DuPont YS074 as an excellent optional choice if more readily available. Both of these are automotive type paints that are intended to be applied using spray equipment. The PPG numbers are available in acrylic enamel and acrylic urethane single stage and base coat/clearcoat in PPG's economy OMNI line. You can also step up to PPG's premium Deltron line (more $$$) in acrylic urethane single stage and, I think, a base/clear. All carry the same basic number of 60080. The OMNI acrylic enamel single stage is referred to as MAE60080. The OMNI acrylic urethane single stage is referred to as MTK60080. The Deltron acrylic urethane single stage is called "Concept" and is referred to as DCC60080. There is no paint code stamped on the tractor similar to the system used on modern automobiles. Rod
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