Unusual and Wonderful 19th Century Set of Miniature Geometric Solids in 19th Century Signed Dovetailed Box miniature architecture Really all quite beautifully done

Really all quite beautifully done

and I'd guess it dates to the 1920s or so

And the faces and specificity of details in the engravings is just wonderful

with an indent in the rounded top which seems as if made to meet a flat head screwdriver or coin in order to twist off the top

and may shed a bit when moved around

Unusual and Wonderful 19th Century Set of Miniature Geometric Solids in 19th Century Signed Dovetailed Box miniature architecture Really all quite beautifully doneMy heart skipped a beat when my eyes landed on these, the likes of which I've never seen and what could make me happier than geometric solids in miniature form?! And in a lovely 19th century slide lid box with fat dovetailed joints to boot? Plus provenance: a slip enclosed indicating they came from the estate of Doctor of Philosophy Kurt Bonstedt, a consultant in technical chemistry, with two addresses listed for him in Germany. I have not counted all