Honda 90, 1967

 This was the most beautiful thing a rural kid travelling by bicycle could have imagined back then.

Starrett micrometer patent

 Patent 433, 311 Datamp notes it was not known to be produced.

100th Bugatti 46 chassis

 Monsieur Bugatti (center, behind steering wheel) with staff and friends posing at Molsheim in 1930. I wonder what the chassis number is. Bugatti register.

Triumph in 1967

 Just not sure what they're selling here...

Sidecar Sunday

 Hauptman trial? Anyone remember the Lindbergh kidnapping?

Seemed like a great idea at the time...

 

Link belts

The Teach Yourself books
 A E Peatfield, Engineering Components and Materials. The English Engineering Press, 1951

 Still around today... 

Lee Valley

Baldwin Duckworth chain

1948

 Care and lubrication here.  History of Baldwin Duckworth here.

Unnecessary cross section view?

Cyclopedia of Modern Shop Practice, American Technical Society, Vol 1, 1903

 The mystery of vise mechanisms revealed! No one could have known.

The Future of Transportation!

Junior Language Book B by Donalda Dickie, 1938

 But hadn't we already eliminated Zeppelins a few years earlier?