The case is made of high quality 0,5mm thick stainless steel sheet.
The surface is mirror finish polished.
Front glass is PMMA (Acrylic glass).

This instrument is front loaded for easy access.

Classic quartz clock.
Accuracy ±6 min./year

Drawing

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Front loaded instruments

All 842/843 instruments are front loaded for easy access.

All 852/853 instruments (except 853 MC) are front loaded for easy access.

The example here is a 852 C clock.