Breitling SA
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Breitling SA is a Swiss luxury watchmaker founded in 1884 in Saint-Imier, Switzerland, by Léon Breitling. The company is known for its precision-made chronometers designed for aviators and is based in Grenchen, Switzerland.
Breitling Aerospace Avantage with titanium case
Breitling Navitimer wristwatch with circular slide rule
Breitling Emergency wristwatch
Slide rule
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A slide rule is a hand-operated mechanical calculator consisting of slidable rulers for evaluating mathematical operations such as multiplication, division, exponents, roots, logarithms, and trigonometry. It is one of the simplest analog computers.
Typical ten-inch (25 cm) student slide rule (Pickett N902-T simplex trig)
Cursor on a slide rule
This slide rule is positioned to yield several values: From C scale to D scale (multiply by 2), from D scale to C scale (divide by 2), A and B scales (multiply and divide by 4), A and D scales (squares and square roots).
A 7-foot (2.1 m) teaching slide rule compared to a normal-sized model