Grönefeld 1941 Principia Automatic Made to Order in Stainless Steel, White Gold or Red Gold

$ 38,100.00 USD


The Grönefeld 1941 Principia Automatic is offered with an array of dials, all crafted in solid sterling silver. The would-be wearer can choose from a cream lacquered dial with roman numerals, a refreshing matt turquoise or light blue dial with polished applied baton hour markers. Alternatively, the company's rhodium plated or gold plated salmon dials are also available.

The Principia is housed in the company's 1941 case. Named after the year their father Sjef was born, the 1941 case exudes grace from every angle. It is available in red gold, white gold or stainless steel. A sapphire case back has been fitted to confer a spectacular view on the extensively hand finished movement with their well known stainless steel bridges and a 22K solid gold oscillating weight.

Each movement is finished and assembled by hand. To emphasize the manual labour involved a gold plate, engraved with an individual number, is applied to the movement.


CaliberG-06Movement dimensionsDiameter: 32,0 mm
Thickness: 5,5 mm

Number of parts 226 parts

Power reserve 56 hours

Number of jewels 31 jewels, partially set in solid gold chatons

Automatic system Uni-directional winding mechanism. For 24 hours of autonomy 633 rotations of the Oscillating mass are required

Oscillating mass Entirely decorated by hand. 22 karat solid gold. Pivoted on a high precision ceramic ball bearing to avoid excessive wear and the need of lubrication

Balance wheel Variable-inertia balance wheel with four white gold timing screws (diameter 10 mm)Frequency 21.600 vibrations/hour

Balance spring Free sprung with Phillips terminal over coil curve with triangle hairspring stud

Escapement Jewelled Swiss lever

Main Plate Spotted and ruthenium electroplated brass main plate

Bridges Stainless steel, bevels polished by hand, micro-blasted center, circular grain on the top to highlight the bridges shapes and relief engravings
DisplaysCentral hours and minutes Small seconds at 6 o’clock

Case and dial

Case dimensions Diameter: 39,5 mm Thickness: 10,5 mm
Water resistance 3 atmospheres – 30 meters – 100 feet

MaterialWhite Gold Au750/Pd210 (Non Rhodium plated), Red Gold Au750 5N or Stainless Steel
Engraving: Grönefeld and the individual number

Crown Case matching material, engraved with The Horological Brothers logo

Dial Base material: Solid Sterling Silver 925

Hands Extended Lancette hands. Flame-blued steel and mirror polished centres. Small poised seconds handStrap

A vast variety of leathers and colors are available. 20mm-18mm

Buckle Pin buckle made in Red Gold Au750 5N, White Gold Au750/Pd210 (non rhodium plated) or Stainless Steel 916L engraved with Grönefeld. 18mm

Crystals Domed sapphire crystal on the front with hard anti-reflective coating on both sides
Flat sapphire crystal on the back with hard anti-reflective coating on both sides

Number of components 54 parts

Total weight Stainless Steel 74 Grams
Red Gold 97 Grams
White Gold 97 Grams