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93 in (43 cm)
Crystals Bevelled mineral glass Movement Sattler caliber 1955-4 Power reserve 30 days Drive 3100 g weight on rope pulley with jeweled bearings Oscillator Invar pendulum Ø 12 mm
600 g with pulley Oscillator Wood rod pendulum with solid
The barometer with aneroid capsule measurement also possesses an indicator to mark the actual air pressure in hPa or inches
with its 1
PULLEY WITH BALL BEARINGS Mechanica M1 Carbon 93 in (43 cm)The pulley with ball bearings offers not only visual appeal but has also two technical advantages: Its ball bearings do not wear and keep friction to a minimum, which improves the accuracy of the clock.