GM Chevrolet '57 Chevy Transmission Manual Standard 4 speed T10

Description

Ron said this was the original tranny from his 57 Chevy.  It sat in his garage for a decade then he dumped it in my backyard before he moved to Idaho.  You determine what it is and if it will fit your needs from the numbers in the photos.
Photos show everything else we know. Good for parts or winter project. Or maybe good for nothing.
As is where is no warranty express or implied. Absolutely no returns for any reason whatsoever. This is a pig in a poke - could be a gem or a waste of your money so bid accordingly.
Located in Montgomery County MD. Local pickup only. Delivery may be possible between DC and Chicago sometime in November, or more locally for beer and gas money and help getting it in and out of my truck.
LATER EDIT: https://www.motortrend.com/how-to/1808-guide-to-muncie-m20-m21-and-m22-four-speed-transmissions/  seems to indicate this is a 4 speed manual transmission from the Warner Gear division.
see also:  https://www.hemmings.com/stories/article/borg-warner-t-10-four-speed