Unknown vintage track frame (prob Jaap van der Bergh) restoration

Flea market.
I'm going to build it up with the little money i have. I need a lot of parts so every single one of m will be cheap. Maybe at some point i will do a proper, period correct build up with sexy parts. Will post some parts soon on here.

Nice going! Eager to see it done justice with some nice parts. Sorry I wasn't much help in the identification dept.