DEVISOR Termijn
- Inventor
- Unknown
- Invention date
- Unknown
- Manufacturing date
- Unknown
- Manufacturing location
- Holland
- Manufacturer
- Koller & Van Os
- Dimensions
- L 48 W 23 H 4
- Reference Number
- 228
History and Functionality
This instrument used in Holland can do calculations for currencies exchanges:
Guilders, Lira, Swedish Krona, French Francs, Swiss Francs, Belgian Francs, US Dollars, and Marks.
It consists of seven independent sliding rules.
Each sliding rule is assigned a currency.
On each sliding rule one can perform two types of conversion:
- Florin to the currency of the rule
- Currency of the rule to the US Dollars
