Post the photos? Love to but despite reading all the "how-to" instructions on posting I still cannot figure it out. As far as authenticity is concerned I cannot say. It is a mechanical bottle jack with a folding handle. It was in the truck when I bought 15 years back. Looks like what I thought they were.

1949 Chevy 1/2-Ton
"Sedgewick"
In the Gallery
1989 Caprice