1942 Carl Lange Stereoscopic Opthomological "Coordinator" Slides - Set 3 lock shaped key holder 1970s) Color-Aid Standard Set of

1970s) Color-Aid Standard Set of 202 color swatches

with the final marble ending up in the centre hole

with light wear and minor foxing along edges

I purchased this and a second naive watercolor drawing of an Indian chief

1942 Carl Lange Stereoscopic Opthomological "Coordinator" Slides - Set 3 lock shaped key holder 1970s) Color-Aid Standard Set ofI 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