1942 Carl Lange Stereoscopic Opthomological "Coordinator" Slides - Set 3 three-wheel pull toy with a light center crease

with a light center crease  and a tiny bit of light foxing at upper right

I am not entirely sure the age of this hand-formed and hand-painted bowl

9 1/8" t x 7 1/16" w

then I'll list another handful together

1942 Carl Lange Stereoscopic Opthomological "Coordinator" Slides - Set 3 three-wheel pull toy with a light center creaseI was pretty excited to find a box full of these handmade slides at the flea market this weekend a box in which many were rolled up in newspaper from 1945, seemingly untouched since then! What I've learned is that Carl W. Lange Sr. and Jr. , who copyrighted this set of stereoscopic slides in 1942, were father and son opthomologists with a practice near St. Louis and a particular commitment to curing myopia (nearsightedness.) They wrote and travelled