![](https://coimages.sciencemuseumgroup.org.uk/74/294/large_thumbnail_1990_0459__0002_.jpg)
![Standard 6 diagonal scale in case; brass 6 7/8' x 3 7/16'](https://coimages.sciencemuseumgroup.org.uk/326/589/medium_smg00045863.jpg)
Standard 6" diagonal scale in case; brass 6 7/8" x 3 7/16" screwed by 4 screws to mahogany base with a mahogany cover, overall size with cover on is 7 7/8" x 4 1/8" x 7/8", diagonal scale gives thousandths, engraved "John Bird London"
Details
- Category:
- Mathematics
- Object Number:
- 1911-184
- Materials:
- base & cover, mahogany and scale, brass
- type:
- drawing instruments and diagonal scales
- credit:
- J.C. Stevens Auction House