Appreciate the comments, Jani. Any additional info on Johann Erhart's heirs & assigns? Maybe his address?

IM:
I have these written on the back of my hand so I don't know all the characters:

ä - hold "alt" while pressing "132" on number lock
ö - hold "alt" while pressing "148" on number lock
ü - hold "alt" while pressing "129" on number lock
ß - hold "alt" while pressing "225" on number lock

and the degree symbol, ° , is "248".

Kind Regards,

Raimey
rse