Gilbert Catalog
Price in 1949: $5.95
Gilbert Electric Engine with auto mobile type gear shift for forward, reverse and stop. The ideal power plant for Erector models and for Junior Eorector Ferris Wheel. Operates on 110 volts A.C., 60 cycles only. $5.95. Denver and west. $6.25.

Price in 1955: $5.95
Ferris Wheels revolve, Bridges raise and pistons pump when this rugged power plant goes to work. Has two forward and two reverse positions on power take-off. By adding extra gears provided with most sets 6 1/2" and up), additional speeds can be obtained. Motor rated at 120 volts, 60 cycles, A.C. Approved by Underwriters' Laboratories.