The somewhat smaller 37 Roman also masters the principle of reduction with perfection. All hallmarks of pure watchmaking artistry stand for its precise functionality. The subsidiary seconds recessed in the dial and the typical ATUM hands have been rescaled to the 37-millimetre diameter of the case.

The lancet-style hands and the Roman numerals that take the place of the applied hour markers assure very good legibility from any angle. Grossmann’s calibre 102.1 movement under the dial has a dainty diameter of 26 mm and is only 4 mm high.

Details

The case

The dial

The case

Accommodated in the 37-millimetre case, the small ATUM is just as balanced and well proportioned as its role model. The noble grace of the strap lugs, the elegance of the slender bezel, and the ergonomically shaped crown are the key facets of an immaculate case. The rose-gold version of the 37 is worn on a brown alligator leather strap while the white-gold model has a black strap.

The dial

With the 37, an argenté-coloured solid-silver dial with brown-violet numerals is combined with a charcoal minute scale and hands annealed to a brown-violet hue. The elegantly drawn Roman numerals underscore the classic appeal of this universal timepiece. Thanks to the fine tips of the smaller ATUM hands, the hours and minutes are always easily legible. As in the large model, the subsidiary seconds dial is recessed in the main dial at 6 o’clock and accentuated with a polished chamfer.

The calibre 102.1

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Tech Specs

Movement

Manufacture calibre 102.1, manually wound, adjusted in five positions

Special features

Shock-resistant balance with inertia and poising screws, impulse pin integrated in rim; flat balance spring; balance staff with integrated safety roller; index adjuster with Grossmann micrometer screw; pillar movement with 3/5 plate, frame pillars and separately removable clutch winder; frame parts in untreated German silver; raised gold chatons with pan-head screws; remodified Glashütte stopwork with backlash; mainspring barrel with bilateral jewel bearings for optimised power management in the low-torque range; ARCAP train wheels; proprietary escapement with 18-tooth escape wheel

Functions

Hours, minutes, and subsidiary seconds

No. of parts

188

No. of jewels

22, of which 3 in screwed gold chatons

Escapement

Lever escapement

Oscillator

Shock-resistant Grossmann balance with 4 inertia and 2 poising screws, Nivarox-1 balance spring

Balance

Diameter 10.0 mm, frequency 21,600 semi-oscillations/hour

Power reserve

48 hours when fully wound

Operating elements

Crown in 750/000 gold, with gemstone, for winding the watch and setting the time

Case dimensions

Diameter: 37.0 mm, height 9.2 mm

Movement dimensions

Diameter: 26.0 mm, height: 4 mm

Case

Three-part, in 750/000 gold

Dial

Solid silver, Roman numerals

Hands

Manually crafted, steel, annealed to a brown-violet hue

Crystal / display back

Sapphire crystal, antireflective coating on one side

Strap

Hand-stitched alligator leather with prong buckle in 750/000 gold

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37 Roman

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