Rolls-Royce Archives
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From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Comparison photograph of two different tire tread patterns, labeled MA1 and MA2.

Identifier  ExFiles\Box 171\2\  img058
Date  12th June 1932 guessed
  
MA1
MA2
  
  


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