. The little Class A Climax is moving logging cars one-by-one to dump their burden on the inclined beams that bring them to the sawmill built from a Fine Scale Miniatures kit.
As Michael Koch explains in Steam and Thunder in the Timber,
The Climax locomotives were offered in three classes, referred to in their catalogue as Class A, Class B. and Class C. Class A locomotives ranged from 12- to 22-ton sizes. Class B locomotives lacked the gear-shift feature and ranged in size from 17 to 62 tons. On these the position of the cylinders was hanged to an angle of about 25 tons with the horizontal. This inclination of the cylinder was a chaacteristic of the Class B Climaxes, making them instantly recognizable. Class C locomotives could be had in weights from 70 to 100 tons. [Koch, p. 50 GPL].
Labbe, John T., and Vernon Goe. Railroads in the Woods. Berkeley, California: Howell-North, 1961, p. 76.
Koch, Michael. Steam and Thunder in the Timber: Saga of the Forest Railroads. Denver: World Press, 1959.