It is a Berk "R" nozzle. Came on the "R" pumps or special order on other pumps. From the factory it had a small bolt on rudder. Same nozzle I will run on my Eliminator with a Place 1/2 droop.
I thought that may have been the case, though I'd never seen an 'R' nozzle up close.
Is it worth anything? I'll be using my FTN diverter, so don't really need this nozzle. It does have a small area on the exit side that looks porous. No cracking anywhere that I can see.
Was the ram-horn style reverse bucket featured on the 'R' pumps? Got one of those too.