Ochs und Junior announces the Moonphase / Selene collection

Ochs und Junior is thrilled to announce the newest Ochs und Junior family member, the moon phase / selene collection. Praised by experts as one of the most precise moon phase timepieces available, OUJ takes great pride in presenting this remarkable creation.

The Ochs line moon phase / selene showcases the exclusive Ochs blue hue, accentuated by rhodium-plated markers, hour and minute hands, and a full moon display. The new moon is adorned with a stunning patina, while the second hand elegantly matches the ochs blue shade.

Designed by Ludwig Oechslin, the ochs und junior moon phase / selene is one of his most iconic creations. This astronomical marvel not only tells the time but also provides the date and accurately displays the moon’s phases.

Through meticulous calculations, the ochs und junior moon phase / selene accurately calculates the lunation period, which spans 29.5306122449 days. This timepiece remains precise for an astonishing 3,478.27 years before deviating by a single day. Once set, you can rely on its accuracy for as long as you own it—just remember to keep it wound.

Revolutionizing Moon Phase Watches: Ludwig Oechslin’s Ingenious Approach

Moon phase watches are renowned for their complexity, but Ludwig Oechslin has always been a visionary who thinks outside the box. While traditional moon phase complications consist of numerous intricate components, the selene/moon phase module of the Ochs line defies convention with just five additional parts.

Ludwig Oechslin’s moon phase watch not only displays the time and date but also meticulously tracks the ever-changing phases of the moon. The unique moon phase function is achieved through a brilliantly designed 5-part epicyclic gear system module that remains accurate for an astonishing 3,478.27 years before deviating by a single day. The analogue spiral “dot date” indicator offers a visually superior cue compared to a digital display, seamlessly blending the date with the clockwise arrangement of the hours and minutes.

In this remarkable timepiece, the centre represents the Earth, while the prominent dot at 12 o’clock symbolizes the radiant Sun. The full moon is depicted when the moon aligns directly opposite the Sun and Earth, positioned at 6 o’clock. Conversely, the new moon occurs when the moon is concealed between the Sun and Earth, illustrated by a dark circle at 6 o’clock.

Ludwig Oechslin’s inventive approach to moon phase watches sets a new standard for simplicity and accuracy, providing watch enthusiasts with exceptional timekeeping experience.

Mechanics

How does Ludwig Oechslin’s moon phase work?

Have you ever wondered how Ludwig Oechslin’s moon phase watch operates? Let’s delve into its intricate mechanics. A central finger, directly bonded to the hour pipe, propels an epicyclic gear train that rotates the lunar disk in a counterclockwise direction beneath the dial. The central finger engages with a 12-toothed wheel, whose pinion meshes with a 14-toothed wheel, further connecting to an 18-toothed wheel. Finally, the pinion of the latter meshes with the fixed recessed ring gear boasting 109 precisely machined teeth on the underside of the dial.

What is the benefit of a highly precise moon phase calculation?

Now, what is the significance of a highly precise moon phase calculation? The average duration between two identical moon phases is approximately 29.530589 days. Most moon phase watches approximate this duration as 29.5 days, resulting in a deviation of one day after just two years. However, the Ochs und junior moon phase takes accuracy to new heights by calculating the lunation as 29.5306122449 days. This exceptional precision ensures that the moon phase prediction remains accurate for an astonishing 3,478.27 years before deviating by a single day. In simpler terms, you only need to set the moon’s phase once, and you can trust that it will faithfully display the moon’s various phases.

In summary, Ludwig Oechslin’s moon phase watch is a remarkable timepiece that not only showcases the phases of the moon but also provides the date and time. Its unique moon phase function is realized through a meticulously crafted 5-part epicyclic gear system module, guaranteeing accuracy for an extraordinary span of 3,478.27 years before requiring adjustment. The inclusion of an analogue spiral “dot date” indicator enhances visual clarity compared to a digital display, seamlessly harmonizing the date with the clockwise arrangement of the hours and minutes.

Price

CHF 5,500 – Incl. 7.7% Swiss VAT
CHF 5,077 – Export price.

Order

Orders can be placed by e-mail to oj@ochsundjunior.ch or directly on the homepage. Delivery is estimated for 12-16 weeks from order.

Further Information
Dimensions	42mm x 11mm (incl. crystal) 39mm x 11mm
Weight	42mm titanium: 70g (incl. leather strap and buckle) 39mm titanium: 62g
Water Resistance	100m in titanium
Case	2-part case in grade 5 titanium designed by Ludwig Oechslin.
Moon phase function	5-part epicyclic gear system designed by Ludwig Oechslin. The calculation is precise for 3,478.27 years before it will be off by one day.
Date function	30 + 1 hole date spiral with 5-minute markers that serve as reference points designed by Ludwig Oechslin.
Base movement	ETA 2824-2 with 38 hours of power reserve. Manufacturer: ETA SA / Grenchen / Switzerland.
Crown	Screw-down crown in grade 5 titanium designed by Ludwig Oechslin (39mm and 42mm). Manufacturer: Pibor SA / Glovelier / Switzerland.
Buckle	Designed by Ludwig Oechslin for 22mm watch straps with no loops. Visible machining marks. Grade 5 titanium.
Watch strap	Ecopell Enzian leather strap handmade by Sabina Brägger.
Crystal	Sapphire Crystal
Superluminova in blue	RC TRITEC in Teufen / Switzerland, application by Monyco in La Chaux-de-Fonds / Switzerland.
Swiss Made	The ochs und junior moon phase watch is entirely manufactured in Switzerland. Each watch is hand-assembled and regulated at the ochs und junior workshop in La Chaux-de-Fonds.
Warranty	Two years.