Triumph
- http://www.ianchadwick.com/motorcycles/triumph/
- Triumph club Nederland
- Peter Cornelius Triumph specialist
- Rob Stockdale’s rigid frame Triumph
- Triumph all models serial numbers
Maintenance/Spares
- Richtspecialist Van der Wouden Techniek
- Smiths Chronometric: Jos Beentjes (email: mirjam.jos at quicknet dot nl)
Trade/Dealers
Other
- Rob’s WD Norton site Norton WD16H
- Henk’s BSA M20 site BSA M20