Opti-Treck

Under the name Opti-Treck mechanical analogue...
Under the name Opti-Treck mechanical analogue Höhenmesser are offered. Höhen knives are aneroid barometers with which it is possible to study the weather development in addition to the Höhen measurement. The analogue Höhen knives are used for outdoor activities such as hiking, parachuting, climbing and much more.
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