This steam traction engine was built by Owens, Lane, Dyer and Co. of Hamilton, Ohio, most likely in the 1870s. Its particular gear drive mechanism, along with the incline cylinder, distinguish it as an O.L.D. and Co. machine. According to the story, this steam-powered tractor first saw service in the mines near Placerville. It was later purchased by N.A. and J.E. McKay for use in their logging and sawmill operation on Love Creek near Avery. When the noisy engine was driven on the long road from Placerville to its new home, it made its presence known everywhere it went, and an attempt to sneak it through Murphys under cover of darkness failed as almost the entire town was awakened to witness its arrival. To meet the requirements of its new owners and run on rails, Jenny was fitted with new railroad wheels in front and the rear wheels were altered. All the castings for this retrofit were produced by D.D. Demarest at the Altaville Foundry. Jenny remained in service until its retirement in 1904.