Velorama bicycle museum, Nijmegen, Netherlands. Best museum in Europe.
Dutch veteran bicycle club. Includes a very good internet forum.
British bicycle museum, offers an enormous collection of bicycle catalogues online. Pay per MB download or become a V-CC member.
A nice little classic bicycle shop in Den Bosch, Netherlands.
The best site about Dutch bicycles. In Dutch, German and English.

The Old Spokes Home
It's a shame I have never been there. Just look at their museum gallery!

Sterba Bicycles from Czech
Hundreds of antique bikes and I really love their pictures. Where do they get these jewels from?
Als u iemand zoekt die met de hoge bi kan showfietsen op productpresentaties, een feestelijke opening en dergelijke. (just Netherlands and Belgium)
Mooi jubileum van de nederlandse antieke fietsenclub, juni 2016 in Oirschot!