3/4 size couplers

A number of western narrow gauge railroads used the 3/4 size coupler. Besides the White Pass, the Southern Pacific used the 3/4 size on its narrow gauge line. Also the Nevada Central, Eureka-Nevada (Eureka & Palisades), the Nevada County Narrow Gauge, Illwaco, and Northwestern Pacific used the 3/4 size coupler.
The full-size was used by the Pacific Coast Railway, the Nevada-California-Oregon, Oahu, and the Plaster City operation.
Interesting is that the Los Angeles Railway (42" gauge street car system) used 3/4 size couplers on its work flats, gondolas, and work motors.
Brian Norden