Vintage Dental Teeth Plaster Casts Dentist Tooth Impressions Mold Model 1996?

Description

Here is a variety set of plaster teeth molds
The first one is a hinged display model that has some colored teeth on the bottom.This is a really nice display piece. This one is dated 3/29/96 (the others don't have dates)
The second has some coloring and a couple of broken teeth
The third is white and has a chip on mold but not teeth
The last three pieces are large scale teeth approximately an inch tall.
These are all from a retired dentist from Sierra Vista Arizona USA