Hi: There's a guy who did a complete restoration on a K-250-4 including the power switches and the four position pedal & wah pedal. It's Vandenburg Restoration. Looks to me like he did a bang up job on that one and then sold it to somebody. It's vaquely possible that's the one you wound up with yeah? You could contact
him for clues. I've been looking here on this site for that exact model for months with no avail so I'd keep it if I were you. . .those babies are pretty hard to come by. They're definetly 'out there' as in not 'extinct' but pretty rare. I want to run my Wurli thru one of those cuz my freind said they're great for that
especially the tone booster mid-range thingy. . .not to mention speed controlled vibrato and tremolo. . .WOW!
Jake