I have nicer bikes but on this one I spend many a winter hour. The steel frame is 40+ years old and of unkown origin. I bought it as part of a complete bike for 200 guilder at a Groningen thrift shop. A friend added the brazed-on fittings.
The parts are a handy collection of more recent origins, all chosen for comfortable winter training in northern Europe and/or because I just had them hanging around.
I see it as a logical choice for the job but my teammates find my ancient bike rather curious.