A rare and particularly fine early German aviation altimeter by Otto Bohne, Berlin.
Known for fine period barometers and instruments.
Circa - 1914.
In excellent untouched original condition with clear silvered dial and large
adjustment wheel - used to 'set' the instrument before flight.
Originally having a leather case it would have been strung between the bracing wires
of an early monoplane within sight of the pilot.
The ring is missing from the carrying handle.
Height ceiling - 3,500 Meters (11,000 ft)
The outer case is aluminium making the instrument very light,
weight being the enemy of these early fragile machines.
In working condition, responding well to barometric pressure variations.