Some model companies sold unassembled versions of the promo cars, that were typically simpler and easier to assemble than the annual kits (with engine and customizing parts available in the full-blown kits left out). They were molded in color (instead of the traditional white) and easily assembled without glue (thus no glue or paint was required). When assembled these were almost identical to the much more elite promotional models. What usually gives them away is that they were mostly molded in a brighter nonmetallic color without paint matched to official 'Big 3' colors. AMT's "Craftsman" series of promo-like models had perforations in the bodies for mirrors and antennae – thus the model's final appearance was not precisely like a promo (which would have had no custom parts attached to the body of the car). Probably, because of the promo look, however, today these often command higher prices than the detailed "3-in-1" kits, especially AMT's Craftsman series of the early and mid sixties.