Fortis Presents B-47 Calculator
Fortis B-47 Calculator is a cult watch. Developed following the pilots’ specifications to fulfil the requests of all typical flight parameters. Comfortable and highly exact Swiss micro-mechanics in symbiosis with the classical slide rule function. An uncomplicated service of this modern classic permits the exemplarily good legibility. 3 time zones, countdown function, country specific conversion scales. Case back with temperature scale C° and Fahrenheit and watch-identit number.
The FORTIS CALCULATOR is not just a watch but also an instrument for simple calculations used in the same manner as sliderules were before electronic calculators became popular. A second, separate time-zone is available which can also be used as a 24 hour indicator. The bezel is intended for the countdown function and the setting of a third timezone. The CALCULATOR can assist as a professional navigating instrument if the electronic systems on board an aircraft should fail.
Fortis B-47 Calculator
A Swiss watchmaker was the first to find out by thought about the relation of numbers and the way to control them in the system of the logarithms. Jost Bürgi, born in 1552 in the Swiss canton St. Gallen, conceived the base of the arithmetic system which was a must and the basic tool for every engineer or architec and many other technical occupations until 1969: The slide rule, squeezed out by the battery-operated pocket calculator of the 70s, at the same time, when the quartz watch took over from the mechanical watches.
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