Continuation of BigLobe Plarail Museum

Phantom Gem 69: First Generation U-Turn Rail

What does it look like on the back? Is it reversible, or is there an adverse/negative camber?

On the back, not sure.
 

Good question Dr Chris. I do know the the Original Benkei set had 2 sets of these U-Turns which I would assume that the male/female ends should be the opposite.

The C-58 set has 2 sets too. Auctions of these don't come up often, like once or twice a year.