The case is made of high quality 0,6mm thick brass sheet. The surface is mirror finish polished and lacquered.
Mineral front glass.

Tide indicator 
Accuracy: ±6 min./year (±1sec./day).
Barometer accuracy: ±10hPa (millibar).
Thermometer: -20°C to +60°C. -10F to +140F.
Hygrometer: 0-100% relative humidity.
Temperature reading accuracy: ±1ºC (10ºC to 30ºC), ±2ºC (-20ºC to 60ºC).
Hygrometer reading accuracy ±10%.

Delite produces Altitude in Denmark and use suppliers
in France and Germany.