Hand Lift Lever Assembly for IH Farmall or International Cub Tractors.
Farmall Cub Tractor's produced in 1947, which was the first year of production, only had the hand lift as a option. Farmall Cub Tractors had the hydraulic system as a option starting in late 1948.
Referred to as "Master Control Lever" in the operators and parts manual.
The last photo shows how the hand lever attaches to the tractor.