This ring has characteristic of a production made between 20.4.44 and 21.6.44 and doesn't match with the date '43.

Furthermore it cannot be possible the design of the Heilszeichen runic panel (and of the leaves around it) is completely different from originals; this only happens because who made this ring used an original that was worn on the round panel (like mostly are!) and reworked completely the round panel trying to reconstruct it, to make it appear like new in the copy. Who reworked the Heilszeichen was surely not someone who really know these rings, since he draw two "SS" instead the real "Gibor" rune, changing completely the meaning of the entire panel and so of the entire ring. Other problems are present in the swaz panel too.

Again, the liver of sulphur used is a modern one; for trained eyes is visible in the area around the skull with its typical heavy blackening (but easily removable).

Another point: from the pictures there is no match between the condition of the outside and the inside: inside the ring shows hundreds of small dents while the outside looks very well preserved (usually is the contrary!).

Last: the engraving clearly shows 2 different styles, one is the original that the high quality rubber mold can take from the original, the second is the date and the Himmler signature that, who made this ring, tried to copy with no good results; he tried to modify the date (that, again, in my opinion was '44!) turning it into a '43 ring.
He surely made a good work, but not enough to turn a fake into an original.