The Betsy was built by the Yosemite Mountain Madera Sugar Pine Railroad in the 1880’s. It was California’s first geared locomotive, not to be confused with the shay locomotive, but due to its large bull gear driving a gear on each axle of the drivers.

It lasted in logging service until 1937. The model is an electrically powered brass and steel model, built in 1:20.3 scale for 45mm track, replicating 3 foot gauge.