WWII (3) AIRCRAFT CERAMIC SPARK PLUGS CHAMPION C27 w RF SHIELD CAPS C26 M41E vtg for Sale

WWII (3) AIRCRAFT CERAMIC SPARK PLUGS CHAMPION C27 w RF SHIELD CAPS C26 M41E vtg For Sale

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WWII (3) AIRCRAFT CERAMIC SPARK PLUGS CHAMPION C27 w RF SHIELD CAPS C26 M41E vtg:
$95.00

three circa 1940s period Aircraft Spark Plugs with ceramic insulators -- all are massive style with four electrode ground lugs -- two are Champion C27; the third is not branded on the insulator but has a few stampings on the hex part ['0137' '706' and a 'B...'] - it has a little fatter electrode but is very similar in size to the C27's --
-- also included are three matching plug cover shielding caps - I was kindly informed these are 'RF' shielding caps that require a screw-on top lid to function properly [not found with these] --

-- wear from time to the plugs including some moderate rust patching / electrode appears unused - not able to test so sold as is -- cover caps have light tarnish ---- found the following information about these plugs:
"Massive style plug
SIZE 18mm 1/2” Reach
CURRENT PLUG TYPES: M41E
DISCONTINUED PLUG TYPES: M42E, M41N, D41N, C27, C26 Pratt & Whitney
Teledyne-Continental A-65 through Go 300 series engines
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