Hey guys I stumbled on this today trouble is it has the full design but the date I wonder if I can figure the date out? However is this a die cap error and does it hold value at all?
Domed button. Commonly seen on Australian silver coins of the WW2 era. (particularly sixpence). They'd do 'em up like that, and then braize a loop onto the concave side for a shank. So it's intentional alteration (post-mint damage), and not an error, but it's very likely WW2 "trench art", which is neat. Likely to have pretty modest value, but it's got that "conversation piece" aspect. Since I do not see any trace of solder or braizing on George's face (where a shank for a button would have been attached), it is also possible that this was made into a lid for a small pill box or something of that kind. Something like this, only the Etsy page I linked to is for a modern item done in vintage style. I think your piece is genuine WW2 trench art, though it's possible the alteration could have been done anytime from 1937-1948.* (* This coin has ": IND : IMP" in the legend, which declares George VI as emperor of India. They removed that bit from the coins in 1948, after India had gained independence.)
