This is a rare Great Britain Penny Black stamp from 1840 featuring Queen Victoria.

Stanley Gibbons Catalogue No. SG#GB 1PL9

Left M

Right I

Red Maltese Cross Cancel - Extremely Lightly Struck

Three EXCELLENT margins!

The stamp is still affixed to a letter posted to Edinburgh. The letter still has fragments of the original wax seal and was posted to 104 South Bridge, Edinburgh.

A stunning piece of history.