Scientific Illustration old glass slides

the days of slides; most of these were drawn from specimen in the Museum of Natural History in Vienna. The original drawings are fairly large, about A1 to A0 format.
God knows what I was thinking, but these are even glass slides I had made somewhere in London, of course now after moving around the world a couple of times most have cracks😱

Josiane Keller “mollusk slide” (1993/04)

Josiane Keller “mollusk slide” (1993/94)

Josiane Keller “saw fish slide” (1993/94)

Josiane Keller “pelican slide” (1993/94)

Josiane Keller “star fish slide” (1993/94)

Josiane Keller “swan skull slide” (1993/94)

Josiane Keller “crab slide” (1993/93)