This ‘invaluable’ Cycling Magazine publication, dating from 1945, has a short section devoted to derailleur gears - containing the particularly invaluable comment that gear changing is a matter of ‘knack’.

It also contains adverts with some snappy wartime slogans: ‘Today working for victory, tomorrow again pre-eminent in modern mudguarding...’.

If loose lips sink ships, god knows what damage could be done by any loss of upper lip stiffness.

• Publisher: The staff of ‘Cycling’
• Country: UK
• Date: 1945
• Derailleur brands: Cyclo Gear Company, TriVelox
• Derailleurs: Cyclo Standard