Re:
Yes the serial number an odd place and checked classic lightweights frame number and nothing on there. I remember looking for a mystery frame I have and seeing a Selbach with similar lugs as yours. Not sure if there is one here. Just googled and found a tandem with serial number 59/ at the beginning but thread stops and a Selbach. Also you have gear hangers on your fear chain stays so it would of had gears, Cyclo maybe, Sully.
Simon
Yes the serial number an odd place and checked classic lightweights frame number and nothing on there. I remember looking for a mystery frame I have and seeing a Selbach with similar lugs as yours. Not sure if there is one here. Just googled and found a tandem with serial number 59/ at the beginning but thread stops and a Selbach. Also you have gear hangers on your fear chain stays so it would of had gears, Cyclo maybe, Sully.
Simon