 1935 Irish 2d coil stamp

The Rare 2d Coil was an experimental vertical coil stamp, denominated 2d, issued by the Irish Post Office in 1935 and is one of the scarcest, and most valuable, Irish stamps.It is often referred to by stamp collectors simply as "Scott 68b" or "SG 74b", being the Scott and Stanley Gibbons stamp catalogue numbers respectively.