I'm thinking maybe a 1982 PKN10. Early '80s decal scheme, right crankset, chrome fork, 531 frame, available in pearl silver.

It's a really nice bike, but in rough cosmetic shape. It should clean up nicely with a thorough teardown, clean/lube, and rebuild. Touch-up paint matching might be hard. As-is, I'd offer you $200 and hope you took it.

DEFINITELY not one for the scrap heap!