Very nice finds....
This is the 4/4/4 die variety per Charltons 68th, you won't find that Zoell number in any Zoell catalogue but it was assigned using the Zoell terminology for die varieties, which seems to work fine for the George VI 50cent varieties.
The cut in for chrome plating the dies was about half way through 1943 for the 50 cent dies. In the early years (1943 through 1945) the chrome plating sometimes eroded around the sharp edges of letters etc. of the dies, and you can see the resulting patches (Zoell called them mortarset) on coins produced by those dies.
This is the 4/4/4 die variety per Charltons 68th, you won't find that Zoell number in any Zoell catalogue but it was assigned using the Zoell terminology for die varieties, which seems to work fine for the George VI 50cent varieties.
The cut in for chrome plating the dies was about half way through 1943 for the 50 cent dies. In the early years (1943 through 1945) the chrome plating sometimes eroded around the sharp edges of letters etc. of the dies, and you can see the resulting patches (Zoell called them mortarset) on coins produced by those dies.





















