Originally Posted by non-fixie

You're quite welcome. What size would that be, BTW?

I visited the Bontekoe shop today, and spoke to both grandsons who currently run the place. Nice guys, but regrettably they couldn't help me, other than with their assessment that this would have been a bike from "granddad's era". They haven't kept any records, and are not into the old stuff. Quite understandable from a business point of view, but a bit of a bummer. Apparently I'm one of the very few "misters" that drop in occasionally with an old bike.

Oh well.