1941 Principia

Automatic

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1941 Principia Automatic
Cream Lacquer Dial

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.

place your reservation € 33,500.00 Stainless Steel (excl. taxes)

place your reservation € 41,750.00 Red Gold (excl. taxes)

place your reservation € 43,450.00 White Gold (excl. taxes)

MAKE IT YOUR OWN

Red gold CASE

Cream Lacquer DIAL

Brown alligator STRAP

Your Principia

Perspective

Front

Backside

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A movement for connoisseurs

Just as the award winning 1941 Remontoire, Bart and Tim Grönefeld want the 1941 Principia again to appeal to the most discerning watch collectors. It was therefore imperative that the movement was befitting of such a timepiece. The stainless-steel bridges replicate the facades of the Dutch houses, termed 'bell gables', once again, referencing the homeland of the Horological Brothers. The bridges are hand-bevelled, evincing a brilliant gleam and have their jewels set in gold chatons.

The 1941 Principia Automatic is fitted with a 22-karat solid red gold monobloc rotor. The eye-catching oscillating weight is extensively decorated by hand and turns on a ceramic ball bearing, preventing wear and eliminating the need for lubrication.This movement includes a balance wheel, with white gold timing screws, and is equipped with a reliable free-sprung hairspring.

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.

Technical specifications

Movement

Caliber	G-06
Movement dimensions	Diameter: 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
Displays	Central 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
Material	White 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 hand
Strap	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