WEMPE Marine Quartz Chronometer

WEMPE Marine Quartz Chronometer in wooden case (W x D x H: 18.5 x 18.5 x 13 cm) made of oak, stained mahogany-coloured, with hinged lid with mineral glass pane. The polished brass fittings and carrying handles complete the elegant look.

The white dial with black Arabic numerals has a diameter of 95 mm. Unlike the photo, the imprint "Marine-Quartz" is located in the lower half of the dial above the Fab.No..

A stop button enables synchronisation to the second.

This mechanical precision instrument has been manufactured and tested by hand at Wempe for over 75 years in accordance with the former test specifications of the German Hygrographic Institute (DHI). A factory certificate (DIN 8319) is included.

Technical data

• Movement: Stepper motor with 60° step angle, step frequency 0.5Hz, the switching step of the second hand is 1/sec. Jumping
• Electronics: MOS-IC's and semiconductors with gold cap on a 5x135mm circuit board, the entire electronics are located in the lower part of the housing. The oscillator frequency is temperature-stabilised.
• Crystal: Thickness shear oscillator in AT section, frequency 4,194,304 Hz
• Helium leakage rate: 1.10-11 Pa m3/s
• Batteries: 2 alkaline batteries type mono size D / LR20 (included in the scope of delivery)
• Lifetime: 1 year when using alkaline batteries
• Accuracy: Average rate fluctuation 2 PPM at 22°C (± 1°C)
• Protective distance: The protective distance to magnetic compasses is 0.90 m
• Weight: 2.4 kg