A funny, possibly NOS rear frame but for what bike

email (option): viaconsu [at] planet'dot'nl

eoropean, my first thought was peugeot, but checked and it not, my best bet east bloc.

Measure the various fasteners; axle, chain tensioner, plunger pinch bolts...see if they are metric or Imperial. That should help a bit to narrow down the possibilities.

email (option): teladelujo@msn.com