floor jack id

[corporal32]

Hi all,my brother left this floor jack in my garage years ago and i dug it out and wondered if there is anyway to find out type and rating.It seems to function without any weight on it.Only thing i could find on it were some casting numbers
Thanks for any info

 

[Aeromech]

Looks like my Napa floor jack

 

[ex-x-fire]

Looks like a Lincoln. Looks like those older snap on branded jacks.