Back to the latest issue

Calibre analysis / Automatic winding

HAMATIC Enamel: the automatic watch with a swinging hammer

Calibre 106.0 winds through an oscillating hammer rather than a conventional rotor. October’s HAMATIC Enamel pairs this construction with black enamel, with eight watches in each metal.

Published 28 October 20264 min read
HAMATIC Enamel
© Moritz Grossmann · Image source

The essentials first

In one minute

Calibre106.0; automatic hammer winding and manual winding
Frequency and reserve3Hz; 21,600vph; 72 hours
Construction312 parts; 38 jewels; adjusted in 5 positions

Why it is interesting

The most interesting feature is on the reverse: an unusual winding system gives a simple time-only watch another reason to be studied.

Things to consider

The $81,600 price applies to the white-gold MG-004079 in the US. Limited production and a retail product page do not establish that an unallocated watch remains.

Moritz Grossmann · HAMATIC Enamel

The movement in detail

A conventional automatic calibre draws energy from a rotating rotor. In the HAMATIC, an elongated hammer swings above the bridges: wrist motion sets it moving, while a transmission with ratchet elements directs energy to the winding barrel. The energy source is the same — the wearer’s movement — but the architecture is markedly different. The HAMATIC name itself refers to the hammer.

The manufacture 106.0 consists of 312 parts, beats at 21,600 semi-oscillations per hour, or 3Hz, and runs for 72 hours when fully wound. It has 38 jewels, adjustment in five positions and hacking seconds. Manual winding is also provided. This is useful after the watch has been left unworn: the swinging hammer does not remove the need to build energy in the spring first.

The white-gold HAMATIC Enamel MG-004079. Each of the two gold versions is limited to eight watches.Enlarge

The white-gold HAMATIC Enamel MG-004079. Each of the two gold versions is limited to eight watches.

© Moritz Grossmann · Source

October 2026 brings the HAMATIC Enamel for the bicentenary of Carl Moritz Grossmann’s birth. It is a new execution of an existing mechanical construction. Successive applications and firings create the black enamel dial, topped with applied gold Arabic numerals. The 41 × 11.35mm case comes in rose or white gold, limited to eight of each. Official US retailer Exquisite Timepieces lists the white-gold MG-004079 at $81,600; an available allocation must be confirmed separately.

Sources

Moritz Grossmann: official HAMATIC Enamel releaseen.grossmann-uhren.comMoritz Grossmann: calibre 106.0 constructionboutique.grossmann-uhren.comExquisite Timepieces: MG-004079 specifications and US pricewww.exquisitetimepieces.com