Posted 12 years ago
Phatbuddha
(220 items)
A lovely old ivory ruler made in France. I'm not sure how old it is maybe 1930's it's still got the Leather case with a yellow Magnifying glass
A lovely old ivory ruler | ||
| Rules and Rulers122 of 147 |  |  |
A lovely old ivory ruler | ||
| Rules and Rulers122 of 147 | | |
Posted 12 years ago
Phatbuddha
(220 items)
A lovely old ivory ruler made in France. I'm not sure how old it is maybe 1930's it's still got the Leather case with a yellow Magnifying glass
Help us close this case. Add your knowledge below.
Create an account or login in order to post a comment.
your slide rule is most likely pre-1970s, as the introduction of scientific calculators in the early 70s rendered these obsolete. Prior to the scientific calculator the slide rule was use as a mechanical calculator by engineers and scientist for complicated logarithmic calculations.
On another post of a slide ruler on this site is a reference to a website that tracks these instruments and has pertinent info on them. Cool piece...
Nice1 guys :)