Wonder why he would have been getting issued with an obsolete pattern disc in December 1916 when most soldiers would have received replacements of the newer patterns? (and why two, when usually only one was issued).
I certainly smell a rat here, and expecially so when considering that the first fake 'Hitler tags' were produced in some quantity in the 1930s (and intended as mere souvenirs rather than to fool anyone).
Here's an image of a modern fake (that is marketed as such and sold quite cheaply by the American company that makes them... based (I think) on one of the 1930's 'originals' in their collection). Odd that the hand stamped numbers on the auction site tag even contain the same 'errors'!
Anyway, each to their own, I suppose (and if i could afford to splash out for a Hitler tag, I'd be wanting his perforated 1916 pattern version anyway!)