Found this reverse die crack, I believe it is Hans Zoell P445b which he calls a leg spur, I want to call it a poor man's hoof over since the crack does a nice job of simulating the lower part of the hoof, the crack continues up to the top of the 4.

Also two examples of the same 4/4.


Shouldn't the initial 4 follow to the left of the second strike (somewhere along the red line I've plotted).
pginrh, I see in the varieties section that the different reverse dies have been recorded, I'm interested in the die numbers for double dies, but only some are listed in Charlton's and Zoell's ,is there another reference available for these ?
