Moritz Grossmann ATUM Backpage Platinum

The renowned German watchmaker Moritz Grossmann celebrates its tenth anniversary in November. To mark this special occasion the independent watchmaker from Glashütte is pleased to reveal its eleventh special model, the ATUM Backpage Platinum. This platinum single edition piece offers a showcase for Grossmann’s beautiful watchmaking art.

With the exception of the delicate minute scale on the rim of the watch face the dial is completely exposed enabling spectators to admire all the beautifully intricate details of the movement.

The ATUM Backpage Platinum‘s artistically handcrafted movement has been mirrored and shifted to the dial side by Moritz Grossmann’s master watchmakers. Thanks to an unexpectedly large dial cut-out, the characteristic movement details such as Grossmann’s balance wheel, a hand-engraved balance cock and three band snailings on the ratchet wheel can be fully observed while on the wrist. Wide Glashütte stripes are applied to both sides of the movement and the Moritz Grossmann logo is hand engraved on the dial side. Blue hands and blue screws, tempered in the manufactory, complete the elegant colour scheme of this extraordinary watch.

On the back of the movement, the winding and hand-setting mechanisms are openly integrated into the train bridge and can be observed in their full functionality. Almost all parts in the movement are mirrored in order to guarantee their function even when mounted in the opposite position. The ATUM Backpage Platinum is offered with the calibre 107.0 in artistic hand finish as a single edition 1 of 1.

Technical details

Model: ATUM Backpage Platinum

Movement
Manufacture calibre 107.0, manually wound, adjusted in five positions
Diameter: 36.4 mm, height 5.0 mm
No. of parts: 230
No. of jewels: 24, of which 7 in screwed gold chatons
Escapement: Lever escapement
Oscillator: Shock-resistant Grossmann balance with 4 inertia and 2 poising screws, Nivarox 1 balance spring with No. 80 Breguet terminal curve, Gerstenberger geometry
Balance Diameter: 14.2 mm, frequency: 18,000 semi-oscillations/hour
Power reserve: 42 hours when fully wound

Functions
Hours, minutes, and subsidiary seconds with stop seconds, Grossmann winder with pusher

Operating elements
Crown in Platinum, for winding the watch and setting the time, pusher in

Case
Three-part, Platinum
Diameter: 41.0 mm, height 11.35 mm
Crystal and display back: Sapphire crystal, antireflective coating on one side

Dial
Solid silver, baton hour markers in precious metal
Hands: Manually crafted, steel, annealed to a blue hue

Strap
Hand-stitched alligator strap with prong buckle in Platinum

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; plate movement with 2/3 plate on dial side, frame pillars and separately removable clutch winding mechanism; visible hand setting train on the back side of the movement; frame parts in untreated German silver; Grossmann winder with pusher and stop seconds; 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; balance cock and crown wheel, intermediate winding wheel and ratchet wheel with stopwork on the modified spring barrel bearing with a gold chaton in the ratchet wheel; dial train wheels spoked and beveled, beneath polished bridge

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