For Moritz Grossmann, the goal behind this new PERPETUAL CALENDAR was to create a timepiece that outlasts the changing eras and preserves its being in perpetuity. Its mechanism keeps the date display correct permanently, even when the months differ in length or the year is a leap year. This complication is considered one of the greatest challenges in watchmaking and combines precise technology with master craftsmanship.
| Version | |
|---|---|
| Movement | 101.13, manual winding, regulated in five positions |
| No. of parts | 401 (movement 190/calendar gears 211) |
| No. of jewels | 37, including 4 gold chatons |
| Escapement | Lever escapement |
| Oscillator | Gustav Gerstenberger geometry, Nivarox 1 balance spring, Shock-resistant Grossmann balance with 4 inertia and 2 poising screws |
| Balance | 14.2 mm, Frequency: 18,000 semi-oscillations per hour |
| Power reserve | 42 hours when fully wound |
| Functions | Hours, minutes and seconds, day of week, month, moon phase, Grossmann manual winder with pusher, date display |
| Operating elements | Crown in rose gold/platinum to wind the watch and set the time; pusher in rose gold/platinum to start the watch; correctors in rose gold/platinum to set the date, day of week, month, moon, sum corrector in rose gold/platinum to correct the date |
| Case Dimensions | Diameter: 41.0 mm, height: 13.9 mm |
| Movement dimensions | Diameter: 36.4 mm, height: 8.3 mm |
| Case | platinum, rose gold, three part |
| Dial | argente, argente/anthracite, goldstone moon phase display, inner ring finished with a radiant cut, mother-of-pearl moon, subsidiary dials decorated with Azurage |
| Hands | polished, manually crafted rose gold, manually crafted steel annealed to a blue hue, rose gold |
| Crystal / display back | Sapphire crystal, antireflective coating on one side |
| Strap | alligator leather, hand-stiched, solid prong buckle in rose gold/platinum |
| Strap color | Black, Brown, Blue |
| Special Features | 2/3 plate inspired by historical M. Grossmann pocket watches, gear wheel stopwork with two-teeth backlash, hand setting override and start of movement with lateral pusher, index adjuster with fine screw, location of the impulse pin in the balance (Glashuette style), raised gold chatons with pan-head screws, balance staff with integrated safety roller, frame parts in untreated German silver, stop seconds at the safety roller when the crown is pulled |
| Closer | Pin buckle |
incl. VAT
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Select options This product has multiple variants. The options may be chosen on the product page
incl. VAT
- Delivery and shipping costs included
Select options This product has multiple variants. The options may be chosen on the product page
incl. VAT
- Delivery and shipping costs included
Select options This product has multiple variants. The options may be chosen on the product page
incl. VAT
- Delivery and shipping costs included
Select options This product has multiple variants. The options may be chosen on the product page