red baby trucks

what makes a red baby truck? what models where they? thanks

They were IHC factory built all red trucks built mostly as an advertisement for IHC in the 1920s. They were often used as IHC field service vehicles.
And i want one!

what models where they and how do you know if you have one? is it certain serial numbers or years?

Crismon says: 1921-2 only. Built in the HUNDREDS only for IHC dealers. Model S, 124 inch wheelbase, pickup body with flareboards, red, lettered with " IHC" and " McCormick-Deering".