![](https://coimages.sciencemuseumgroup.org.uk/52/214/medium_thumbnail_1926_0066__0002_.jpg)
Ivory specimen with quadruple helices
![Ivory specimen with quadruple helices (specimen)](https://coimages.sciencemuseumgroup.org.uk/221/856/medium_1928_1162_0008__0001_.jpg)
Hollow ivory specimen with quadruple helices made with turning lathe
Details
- Category:
- Hand and Machine Tools
- Object Number:
- 1928-1162/8
- Materials:
- ivory
- Measurements:
-
overall: 44 mm x 22 mm x 22 mm, 0.022 kg
- type:
- specimen
- credit:
- Holtzapffel and Company