1941 GRÖNOGRAAF - Stainless Steel

Unlike mass-produced cam-actuated chronographs, the 1941 Grönograaf features a classical configuration, namely a column-wheel and lateral coupling, a combination synonymous with high-end watchmaking. The calibre G-04 is a symphony of 408 parts and a wonderful exemplar of no-compromise watchmaking.

Functions: Hours and minutes (decentral), seconds, power reserve indicator, chronograph with large central seconds counter and 30-minute counter
Limited edition: 188 pieces

MOVEMENT
Calibre: G-04
Power reserve: 48 hours
Power reserve (chronograph): 30 hours
Frequency: 21.600 vibrations/hour
Jewels: 45, partially set in solid gold chatons
Components: 408
Dimensions: Diameter 32,0 mm, thickness 6,15 mm
Mechanism: Column wheel chronograph, instantaneous jumping minutes and a soft reset mechanism
Governor: Governor Speed Regulator at 3 o’clock
Balance wheel: Variable-inertia balance wheel with four white gold timing screws (diameter 10 mm)
Balance spring: Free sprung with Phillips terminal over coil curve with Geneva style stud
Escapement: Jewelled Swiss lever
Main plate: Spotted and ruthenium electroplated brass
Finishing: Stainless steel bridges, bevels polished by hand, micro-blasted centre, circular grain on the top to highlight the bridges’ shapes and engravings, relief-engraved Grönefeld logo and the number of jewels

CASE
Material: Stainless Steel
Diameter: 40,0 mm
Thickness: 11,3 mm
Crystal: Domed sapphire crystal on the front with hard anti-reflective coating on both sides
Caseback: Flat sapphire crystal with hard anti-reflective coating on both sides
Crown: Stainless Steel, engraved with The Horological Brothers logo
Water resistance: 3 atmospheres – 30 meters – 100 feet
Components: Case 36 parts; dial/hands 40 parts
Weight: 85 grams (total, stainless steel)

DIAL
Display: Decentral hours and minutes at 1 o’clock; seconds subdial at 9 o’clock; power reserve indicator at 11 o’clock; large central seconds counter; 30-minute counter at 6 o’clock; visible “return to zero” speed regulator at 3 o’clock
Material: Stainless steel base with rhodium plated sub-dials and elements
Finishing: Frosted and satin-grained surfaces

HANDS
Shape: Extended Lancette hands for hours and minutes; poised Breguet style chronograph hands
Material: Flame-blued steel with mirror polished centres

STRAP
Material: Buffalo leather
Lug width: 20 mm – 18 mm
Buckle: Pin buckle in Stainless Steel engraved with Grönefeld, 18 mm