Here's a set of 29 Denoyer Geppert educational Charts, They cover, biology, botany and zoology. 

Each chart measures 44" wide x 35" long, they are bound together by a metal bracket.

These are printed on tear resistant synthetic stock, a kind of polyester velum. There are 29 with one cover/title sheet.  All are in fair used condition, the cover/title page is the worst of the bunch, it has lines across the top where the aluminum bracket was rubbing against the page.  All have some wrinkles, creases and some marks from use but remain very usable. 

These cover Plant structures, Cell division, Basic Genetics and Zoology from single single celled organisms to worms, grasshoppers, Bees, frogs, fish, crayfish & birds. 

The tripod used to hold this chart set for the photos is not included in the sale.  Thanks for looking!