Kato USA Model Train Products EMD F3B Late Type Santa Fe "Warbonnet" N Scale Train
The F-Unit is probably the most recognized diesel locomotive in North American history. It was found on railroads from East to West and North to South. Eastern railroads favored a "Single Headlight" version of the F3, while Western railroads favored a "Dual Headlight" version. Being long lived units, Santa Fe's F3's were continuously being upgraded, with late era revisions having their distinctive "chicken wire" grills replaced by the stainless steel grills that EMD was fitting on their newer F7 productions. These F3's ended up looking remarkably similar to their later built F7 cousins, though they still retained their early style roof fans.