In co-operation with the architect and designer Prof. Karsten Krebs a watch with a jumping hour was created. “Mysterious Planets” is the name of this automatic specialty.

The hour numerals jump up unexpectedly and coincidentally in one of the five dial windows which symbolize the orbits of the planets Mercury, Venus, Earth, Mars and Jupiter around the Sun…

Comfortable and highly exact Swiss micro-mechanics in symbiosis with the classical slide rule function. 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 architect 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…

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…