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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).
Inquiry to The Weston Electrical Instrument Co. regarding their oxidised finish process.

Identifier  ExFiles\Box 38\6\  Scan154
Date  2nd January 1919
  
R.R. 28a (500 T) (S.D.) 408. 28-4-17.) Bm. 2/156/13.

X.3424

EFC1/AT2119.

2.1.19.

Messrs.The Weston Electrical Instrument Co.,
Audrey House,
Eley Place,
Holborn,
London. E.C.

Dear Sirs,

Re Oxidised Finish of Weston Miniature Precision Instruments.

Our Chief Engineer, Mr. Royce, is interested at the moment in the method of obtaining a finish on certain chassis control parts similar to the black finish you obtain on your small instruments.

We wondered if you would be able to give us any information as to how this is accomplished.

Yours faithfully,
  
  


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