Oils on penny
“Copper plates have been used as supports for oil paintings from early time, particularly in Holland. These have been most successful when the pictures were small and jewel-like” — Ralph Mayer. “The Artist’s Handbook of Materials and Techniques”.
This is an uncirculated 1948 (my birth year) penny whose obverse side’s shine is permanently sealed with Spar Varnish along with the edges. The reverse side with the painting has two coats of lead white oil priming. The painting is done in five layers. Around 40 hours actual work on the painting.
This is impossible to photograph. I show it on a black background in its original size to see it better, but can really only be seen properly in one's hand.