Prototype: Swiss Federal Railways (SBB-CFF-FFS) older "standardized" designs. Type AB4, 1st and 2nd class. Type C4, 3rd class. Type F4, baggage car.
Model: The cars have inset roof vents. The diaphragms can be changed. Total length over the buffers 67.8 cm / 26-11/16".
An electric locomotive to go with this car set can be found in the Märklin H0 assortment under item number 37514.