New old stock NOS vintage spark plugs Equivalent to NGK B6ESCheck out my other listings.Suits early Landrover & a host of vintage motorbikes Motorcycles (British & European BSA: C10L, C15, C15T, M21 (Alloy Head), Gold Star B32/B34/B40 Triumph: T140, TR65, and 1979-1983 750 Twins AJS/Matchless: 1950-1964 models with alloy heads.Royal Enfield: 500cc Bullet (1953-1962), 350cc Bullet, Super Meteor, 700cc Constellation.Norton: Model 16H, Big Four, ES2, 88, 7, 99, 19R, 19S, 50, 77, 500T.Vespa: P200E (1978-1981), COSA 200.Lambretta: TV175, Li 1959-on.Others: Velocette (KSS, MAC), Villiers Service engines.