Old 1930's Truck Jack ?
 

Recently acquired this and was told it is for the trucks and possibly cars from back in the 1930's. WAY beyond my field of expertise for vintage trucks or cars. Can anyone verify or have experience/knowledge with this type of jack? Screws in and out fine, retracted length is 6'' and extended length is 10 1/2''. Can not find any markings/ stamping marks at all. Any thoughts on value would be appreciated.