drdon Posted January 29, 2013 Share Posted January 29, 2013 Can someone tell me, for 1937 Studebaker Dictators: 1) is the color of the base of a spark plug an item examined during a national judging?2) if so, is the base silver metal, or a black color as I have heard? I have a 28 Harley with original plugs which are metal bases (unpainted) so I know that older vehicles came without painted bases. Howeve, maybe in the later 30s, this changed. Any help out there? Link to comment Share on other sites More sharing options...
Spitfire8 Posted January 29, 2013 Share Posted January 29, 2013 Blued metal was original. Plated plugs didn't arrive until the mid-1950s. Link to comment Share on other sites More sharing options...
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