Antique Sections of a Sphere Wooden Blocks Set in Finger Jointed Slide Top Box wounded animal I might hold this perfectly

I might hold this perfectly shapes and super smooth thing in one hand while doing so

with light postmark waves along the left side center

really a little gem of a painting

in wooden frame of the same period I believe with sweet carved details around the corners

4" wide x 2 1/4" deep x 1 1/2" tall

Antique Sections of a Sphere Wooden Blocks Set in Finger Jointed Slide Top Box wounded animal I might hold this perfectlyI recently found a couple of c. 1900 Milton Bradley Kindergarten Blocks sets designed by Friedrich Froebel, which the box and the blocks on this set remind me very much of. I have not been able to find another set like this one out there, which I assume were made to teach the concept of fractions, with five slots in the box corresponding to five sets of blocks, dividing a sphere into 2 then 3, 4, 5 and 6 sections. I can't say for sure that these were