H. Moser & Cie. brings two of its icons together for Geneva Watch Days

What happens when H. Moser & Cie. combines one of its flagship product – the Perpetual 1 with its Streamliner collection? We get the contemporary and innovative Streamliner Perpetual Calendar. Read below to know all about it.

The year was 2005 when Moser & Cie. marked its return to Haute Horlogerie with the release of its perpetual calendar – the Perpetual 1. The timepiece like many of its other iterations was minimal, understated but packed in a w hole lot of punch when it came to watchmaking mechanics. In 2021, H. Moser & Cie. takes this flagship product forward by reintroducing this complication within the brand's Streamliner collection which was first launched in 2020.

About the watch:

The 2021 Streamliner Perpetual Calendar comes in a 42mm steel cushion case shaped with perfectly round curves that evokes the very first high-speed trains fro the 20s and 30s whose name it adopts. The case with its off-centre “M” engraved crown at 4 o' clock is set with brands signature black fumé dial with sunburst pattern. Keeping in tune with the minimalistic approach of the brand, the dial houses The dial is home to red and white outer minute track that measures the movement of the central seconds hand, three-dimensional curved hands with Globolight® inserts and the central seconds, power reserve hand and months with white decal. All of these features on the dial is heavily inspired by the dials of car dashboards or measuring instruments.

Covering the dial is subtly domed Galssbox type sapphire crystal that is also present on the caseback. Through the see-through caseback, one can view the mechanism of the HMC 812 (more on that later). The overall case of the Streamliner Perpetual Calendar has been designed with much thought and precision. It boasts of harmonious proportions and beautiful aerodynamics. All of these features of the watch does not stay limited to the case of the timepiece but also extends to its bracelet. The integrated steel bracelet attached to the timepiece works along the same lines as the rest of the watch. It features fluid lines that are all based on organic forms

Powering the watch is the hand-wound HMC 812 calibre that has the same advantages as the HMC 341 calibre. The only difference between the two is the addition of a direct-drive seconds hand on the former movement (HMC 812). Reading time using the ingenuity of the HMC 812 is fascinating to say the least. It uses the indices indicate the months. This is done with the help of the small red and white central hand. It has a guaranteed power reserve of 168 hours, displayed at 10 o'clock on the dial via an indicator. At 4 o'clock, a window indicates the date, in large format, thanks to two superimposed discs which operate one after the other, from 1 to 15 then from 16 to 31.

Another interesting design aspect of the watch is the presence of the date window – set at an unusual angle (that results in the numerals to be tilted to 26°) - that changes in a flash at midnight due to the presence of the “Flash Calendar” instantaneous date-changing mechanism, For further clarity, the leap year indicator is present on the movement side. Clocking in a power reserve of 168 hours, the Streamliner Perpetual Calendar also features an ultra-contemporary finish with the traditional Moser double horizontals stripes and an anthracite grey.

Technical Specifications:

Name: Streamliner Perpetual Calendar

Reference: 6812-1200


Steel topped by a gently domed sapphire crystal

Diameter: 42.3 mm

Height without sapphire crystal: 11.0 mm

Screw-in crown at 4 o'clock adorned with an engraved “M”

See-through case-back

Water-resistant to 12 ATM


Black or fumé with sunburst pattern

H. Moser & Cie. logo in transparent lacquer

Hour and minute hands with Globolight® inserts

Central seconds, power reserve hand and months hand with white decal

Minute track for seconds and minutes

Applique indices


Hand-wound HMC 812 Manufacture calibre

Diameter: 34.0 mm or 15 lignes

Height: 6.3 mm

Frequency: 18,000 Vib/h

33 jewels

Power reserve: minimum 168 hours

Hacking seconds

Double barrel

Moser teeth for all wheels and pinions

Modular interchangeable Moser escapement

Original Straumann® hairspring

Gold escapement wheel and pallet fork

Screwed gold mounts

Balance bridge, train wheel bridge, barrel bridge, and escapement plate with anthracite PVD finish

Main plate, stop lever, and week wheel bridge with microblasted laser finish and anthracite rhodium plating



Hours and minutes

Direct-drive central seconds

Perpetual calendar with date and month

Big date at 4 o'clock, numerals tilted to 26°

Month indicator via red central hand

Power reserve indicator

Leap year cycle indicator on movement side


Integrated steel bracelet

Folding clasp with three steel blades, engraved with the Moser logo

Half-links available

Price: On Request


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