Outside of the overdates, the only other standout occurrence for 1942 Mercury dimes is the fact that it was the last date in the series for which proof specimens would be struck. Making matters even more interesting – and costly for Mercury dime enthusiasts – is that this variety was created at two mint locations: Philadelphia and Denver. This rare variety, created when two obverse dies were made by the impression of first a 1941 Mercury dime hub then one from 1942, is the most popular for the series and indeed quite rare. 1942 would have been a relatively uneventful year for the Mercury dime if not for a die variation that caused quite a stir in the numismatic community – the 1942/1 overdate variety.
