Vtg Antique Quick Detachable “UNO” Spark Plug Hit Miss Tractor Boat Motor Engine. Here is a nice old unusual “UNO” spark plug, with a big thick knurled nut for easy plug separation, for quick cleaning, while the base stays positioned in the engine head. I’ve included many photos to show its condition. It will make a great addition to your collection, or look great in an early engine. Please call if you need additional information. Package will be insured upon request. Most items are packaged with new bubble wrap and new packing peanuts. Sometimes prices are inflated due to the weight of the item. I require all international packages to be insured. Be sure to check out my other auctions and store PLUDGEWORKS. _gsrx_vers_586 GS 6.8 (586). Get your own map of past buyers. The item “Vtg Antique Quick Detachable UNO Spark Plug Hit Miss Tractor Boat Motor Engine” is in sale since Saturday, February 13, 2016. This item is in the category “Collectibles\Transportation\Automobilia\Spark Plugs”. The seller is “pludge” and is located in Carleton, Michigan. This item can be shipped worldwide.