A French art deco walnut J.L. Reutter patent atmos clock, circa 1935.
The 10.3-cm square dial has Roman numerals and is inscribed in the centre ATMOS pendule perpetuelle. The tapered hands are made of blued steel. Below the VI is the inscription brevets J.L. Reutter. The dial has a nickel plated hinged bezel with beveled glass.
The movement is driven by a spring. This spring is wound by the turning motion that is caused by a mechanism that reacts to barometric and temperature changes. The movement needs very little energy and therefore can run for 48 hours on only a one degree temperature difference. The large balance has a thirty second oscillation time.
The rectangular case is veneered with walnut and has nickel plated mounts. The nickel plated base has canted sides and incorporates the lever that fixes the balance wheel. At the back is the knob for fast/slow and a plaque which is inscribed; Brevets J.L. Reutter S.G.D.G. made in France.