A garage find left from British car (TR3/4, MGA, MG"T") restorations are these CHAMPION SPARK PLUGS. These are unused plugs in the original sealed boxes.

They've been stored in temperature/ humidity controlled garages.  

 

Original plugs made at the CHAMPION SPARK PLUG plant in Toledo, Ohio. Plug diameter, thread, reach, and temperature are consistent with published data.

 

Sold as sets in the quantity illustrated.

No return. No refund.

Payment via eBay.

Submit questions.

Thanks for looking.