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Papers re. sparking plug, 1917
Brevet D'Invention. French patent? document No. '485997'. Dated 4th December 1917. Three page document including two diagrams of spark plugs (see original tech. drawing 2001.142/28).
Collection Area
Industry
Item Number
2001.142/26
Measurements
Length
(mm): 309
Width
(mm): 238
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