Hi everyone,
I actually found out, that the book from which Michael gets some of his wonderful illustrations pf cannons is now availible as a faksimile reproduction.
Ulrich Beßnitzer. Zeughausinventar von Landshut, 1485.
It is not cheap but maybe someone like to have it as a hardcopy.
It is 22,8 to 30,5 cm, has 126 pages of text and 120 pages of pictures
You can find it for example under this link, click on the book to see two pages of it.
http://www.froelichundkaufmann.de/in...ventar&x=0&y=0
best from
Dirk