Quote:
Is it true that all original 1780 strikes read "ARCHID.AUST.DUX" while all restrikes read "ARCHID.AVST.DUX", or is there some overlap
It depends on which mint you are talking about.
For Vienna mint:
Original 1780 MTT have AUST DUX( current known population is around 20 coins). Restrikes from 1781 on have AVST DUX. Vienna mint had to recut dies (including much of the tooling) for the restrikes.. and that mint adopted Maria Theresa's son's revised spelling "AVST DUX" immediately.
For Guenzburg (incorrectly,IMHO, labelled by Krause as Burgau) mint:
AUST DUX continued to be used until 1797 then AVST DUX was adopted. Actually I suspect that, as around 1802, Vienna actually struck Guenzburg mint MTT for Guenzburg that all true Guenzburg restrikes bear AUST DUX.
Prague mint: Origional 1780 strike has AUST DUX with the mint signature(on the reverse) of EVs-IK. restrikes from Prague(1812-1820) have AVST DUX and reverse mint signature of PS-IK
Kremnitz Mint: Origional 1780 strike was a Madonna thaler that did not include AUST DUX in any spelling. Restrike( only produced in 1784) had AUST DUX.
Karlsburg mint( Sometimes referred to as Siebenburgen)
No original strike in 1780. all restrikes have AVST DUX
All other mints producing re-strikes used the spelling AVST DUX except for a very few very rare varieties with AVST DVX
has that helped or is it even more confusing?