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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).
Letter from the British Piston Ring Co. Ltd. comparing the finish of Hicrome inserts to those made of Brivadium.

Identifier  ExFiles\Box 132\5\  scan0070
Date  21th March 1939
  
FORM 17.
Continuation Sheet No. 1.
THE BRITISH PISTON RING Co. LTD. COVENTRY.

21st March 1939

Messrs. Rolls-Royce Ltd.
--------------------------

you will be able to identify them by the finish.
The Hicrome inserts are of a much closer grain
and appear to be smoother in the bore than the
ones in Brivadium.


Yours faithfully,
THE BRITISH PISTON RING CO LTD.

[Signature]

SALES DEPARTMENT.


BEC
  
  


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