PHAT actually copied them from a Polish Lepper saddle. I used one on my Uncle Stretch build. They are EXTREMELY comfy and cool looking to boot. They are somewhat similar to a Brooks B135, but with two addition springs across the back middle.
I've picked many OCC choppers for parts in the past, but this was the first time a cheap West Coast Chopper popped on marketplace. Surprised at how better made these are. Cool parts that are more usable than the OCCs