Limited edition desk clock made from an original radial engine piston and hand polished to a mirror finish.
 
Also makes a great paper weight.
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Each solid aluminium piston was salvaged from a Kinner R56 radial aircraft engine as fitted to the Ryan PT22 single engined. A fixed wing military aircraft flown by the USA Army Air Corps during WWII for pilot training.
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Measures 7.5cm x 12.5cm
Weighs in at 1.162 kg