Oh Yippy Skippy Doodle! Prototype knobs! With set screws too! Makes the guitar sound betterer fer shur. I'm pretty sure I know what Jeff Dunham's Walter would call this guy.
Prototypes likely did NOT have serial numbers and after several iterations were marred and holes all over. It's a 1980. Granted a nice example, but.....
Any listing that has to have Rare and Prototype both in the title is one to avoid. Should have added "Vintage" too to round it off.
I bet this guy's day job is a Coney Island freak show hawker. Screaming everything (all caps). How's bout keeping the speshul knobs, skip the run-on BS and just sell the guitar for what it is? It's been up since 09-10-23 and only 11 watchers. That in and of itself tells you something.
https://www.ebay.com/itm/195975071832