Old screw jacks?

Curious how old these are. I have handle rod for the one.
My guess the tall one 60s? Other heavy one 40s?

Sent from my Bell Candlestick

 

I believe that bottom one was originally a house jack. We use them on cars around here.

 

We used the bottom ones when I worked in the Heavy Forge at TRW. We would put them in the presses as a safety support so the ram didn't accidently drop and squish is like a bug while we worked on the dies.

 

Tot one is late 50's early 60's O had a red one and a blue one like that. Teal fun when the little bumper jack pinny thing breaks or one of the rivets lets go on uneven ground. Supposed to be safer than a regular bumper jack.


Denny