The Grönefeld Parallax Tourbillon features a "flying" tourbillon with a large central seconds hand, stop seconds, a power reserve- and winding-setting mechanism indicator. The in-house movement displays sophistication and craftsmanship at the very highest level.
Well-designed and impeccably executed tourbillons are particularly accurate timepieces. The tourbillon is a circular cage encompassing the oscillating balance wheel, the beating heart of the movement. The cage rotates once a minute around its axis, minimizing the negative influence of gravity, and consequently improving the timekeeping of the watch.
Invented in 1795 by Abraham Louis Breguet to compensate the effects of gravity on the balance, the tourbillon still continues to be counted as one of the most ingenious complications in watchmaking. In 1920 Alfred Helwig further developed the tourbillon, removing the necessity for an upper support bridge to create a "flying" tourbillon. The absence of the upper bridge enables uninterrupted views to the fascinating mechanism.
The flying tourbillon allows full appreciation of the concentric, rhythmic "breathing" of the balance hairspring, while ensuring high precision. Bart and Tim Grönefeld further highlighted the tourbillon by raising it out of the movement and above the dial. As with the immaculately finished movement bridges, the tourbillon cage is crafted in stainless steel. Three days are required just for the hand finishing of the tourbillon components.
minimize the possibility of error due to parallax when viewing the seconds hand from an angle, the hand is exceptionally close to the outer chapter ring with the seconds indexes. In a neat addition, the one-armed balance wheel bridge always runs parallel to the central seconds hand.
The ability to set the time to the exact second makes the Parallax Tourbillon potentially more accurate then the vast majority of tourbillons on the market today. Once the time is set and the function set to winding by a simple press of the crown, both the seconds hand and tourbillon cage start running simultaneously and in parallel.
Features and indications
- Flying one minute Tourbillon
- Hours and minutes
- Central seconds
- Power reserve and Winding-Setting indicator
- Innovative Winding-Setting Mechanism with Hacking Seconds
- In-house caliber G-03
Case and dial
- Case material: Stainless Steel 316L(4335) or Au750 red gold
- Engraving 1912: 1912 and individual number in relief - Limited 12 pieces
- Stainless steel security screws
- Engraving RG: Parallax and individual number in relief - Limited 28 pieces
- Serial number
- Gold security screws
- Case dimensions: 43 mm x 12.5 mm
- Sapphire crystals: Top domed with anti-reflective treatment both sides; flat display back with antireflective treatment on both sides
- Water resistance: 3atm/30m/100 feet
- Crown: Steel or gold with engraved “G” logo and push to set/wind function
- Dial: Solid Sterling Silver 925, Frosted surface with diamond cut bevels
- Hours- Minutes dial, power reserve indicator, setting-winding indicator
- Raised seconds dial to minimalize a parallax error
- Hands: Flame-blued steel extended Lancette hands and hand polished centers
- Large counter poised seconds hand
- Strap and buckle: Hand-sewn matte blue or brown alligator leather and steel or gold tang buckle with engraved Grönefeld logo
- Caliber G-03: Mechanical hand winding, flying one-minute stainless steel tourbillon, power-reserve indicator, hacking seconds and setting mechanism indicator.
- Dimensions: 34mm (15 1/4 ’’’) x 9.5 mm
- Number of parts: 278
- Number of jewels: 27 jewels set in solid gold chatons
- Power reserve: 72 hours
- Balance wheel: 10 mm free sprung balance wheel Balance frequency: 21’600 vph / 3Hz
- Balance spring: Phillips terminal over-coil curve, Geneva-style stud. ELINVAR spring by Nivarox®
- Escapement: Straight Swiss lever escapement
- Main Plate: Hand spotted rhodium-plated nickel silver
- Bridges: Stainless steel and beveled an polished by hand, micro-blasted, circular grain on the top, relief engraved on micro blasted surface
- Winding-Setting mechanism: Push function crown for selecting winding or setting
- Power reserve mechanism: Classic Breguet style by means of a cone moving up and down on the threaded barrel arbor