Hi Jim,
Thank you for such a thoughtful and profound reply, as of course always!
Yes, I have seen the Augsburg A, together with a smith's mark, on the barrel of a ca. 1580 wheellock sporting gun, the stock profusely inlaid with engraved staghorn, and I guess I also remember seeing that A struck on 500 year old helmets and breasts.
Interestingly enough, the common Gothic majuscule A as used in 15th c. books greatly differed from the Augsburg shape. I attach two samples from a ca. 1420 Prague illuminated manuscript. This, in my experience, is not unusual though letters struck into stone, wood or iron do not look the same as calligraphic letters as they are composite by various tool strikes.
Best,
Michael