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).
Note on the different gauges of marked and unmarked cartridge type field fuses from experimental stock.

Identifier  ExFiles\Box 166\7\  img009
Date  4th February 1931
  
X6071.
4.2.31.
X6071,
X.4629. CARTRIDGE TYPE FIELD FUSES
(EXPL. STOCK)
Four fuses marked on ends contain finer gauge than standard.
Six unmarked fuses contain courser gauge than standard.
  
  


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