PARALLAX TOURBILLON 1912
The Grönefeld Parallax tourbillon features a “flying” tourbillon with a large central seconds hand, stop seconds, power reserve indicator and winding-setting function indicator. The in-house movement, beautiful solid silver dial and highly polished case display sophistication and craftsmanship at the very highest level. The raised flying tourbillon allows full appreciation of the concentric, rhythmic“breathing” of the balance hairspring, while ensuring high precision. The name “Parallax” is derived from the precision of the readability of the central seconds hand. Parallax is defined as the apparent change in position of an object when the observer changes his own position.
The Grönefeld Parallax Tourbillon was awarded the prestigious Grand Prix d'Horlogerie de Genève for the best watch in the tourbillon categorie.
Calibre G-03
A highly-polished stainless steel sleeve around the tourbillon draws further attention to the beautiful escapement by reflecting the oscillating balance wheel and the rotations of the escape wheel and tourbillon cage. Normally a central seconds hand requires a friction spring to prevent small fluttering caused by play in the gear train. But for the Parallax Tourbillon, the Grönefeld brothers developed the movement with an added pinion and wheel so that the energy-sapping friction spring is not required. The latter feature improves power transfer to the regulator, contributing to the impressive power-72-hour power reserve.
technical specifications
Calibre G-03
Flying tourbillon, synchronized hacking seconds, hand-wound mechanical movement, push-to-wind/push-to-set crown, power reserve indicator, function indicator setting
No. of parts
278 components
No. of jewels
29 jewels set in gold chatons
Power reserve
72 hours
Gearing
Gearing Direct gear train to avoid a friction spring for the center seconds hand by means of an additional wheel and pinion
Tourbillon
One-minute flying tourbillon cage pivoted on ceramic ball bearings
Upper Cage Bridge with single arm. Fabricated in stainless steel
Lower Cage fabricated in stainless steel
Balance wheel
Variable-inertia balance wheel with timing screws (diameter 10 mm)
Frequency
21’600 vibrations/hour
Balance spring
Free sprung with Phillips terminal overcoil curve, Geneva-style stud
Escapement
Lateral Swiss lever escapement
Main Plate
Spotted and snailed rhodium plated nickel silver
Bridges
Stainless steel X46 Cr13, bevels polished by hand, micro-blasted centre and spotted underneath
Circular grain on the top
Relief engraved in the micro blasted surface
Winding-setting
Crown with push function to chose between winding or setting
Hacking seconds
In setting position the cage and seconds-hand will stop at 60 seconds
Power reserve
Classic Breguet mechanism by means of a cone moving up and down on a treaded barrel arbor
Indications
Small hours and minutes at 1 o’clock
Visible tourbillon cage at 7 o’clock
Large center seconds on a raised seconds dial to minimalize parallax error
Power Reserve indicator
Winding - Setting indicator
Material
Stainless steel (1912)
Dial
Solid Sterling Silver 925, frosted surface with diamond cut bevels
Hour- Minutes dial, raised Seconds Dial
Power reserve indicator
Setting-winding indicator
Sapphire crystals
Domed sapphire crystal on the front with hard antireflective coating on both sides
Flat sapphire crystal on the back with hard antireflective coating on both sides
Finishing
Polished bezel and centre band with hand-finished straight graining
No. of components
68 components
Case dimensions
43 mm x 12.5 mm
Water resistance
3 atmosphere – 30 meters – 100 feet
Crown
Gold with engraved with “G” logo and push to set/wind function
Hands
Extended Lancette hands, flame-blued steel and hand polished centers, large counter poised seconds hand
Strap
Hand-sewn mat blue, alligator leather. 22mm-18mm. Stainless steel buckle, engraved with Grönefeld logo
Weight
Approximately 112 grams. Including strap and buckle.
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