GRÖNEFELD – 1969 DeltaWorks Automatic Colours Dial 44.5 mm Stainless steel - 2022Click, to see the large size. ▶ BIG FOTO
Bart and Tim Grönefeld, aka ‘The Horological Brothers’, are third-generation watchmakers. Like their forebears, they live and work in Oldenzaal in the Netherlands. They are proud of their heritage as well as the nation they call home.
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The Netherlands is characterised by flat, low-lying plains. Indeed, 17% of the land was formerly underwater. Unfortunately, the country’s unique topography has sometimes led to floods and, sadly, loss of life.
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A consequence of the country’s unique topography and its sometimes perilous relationship with the sea is that the Netherlands has become a world leader in the field of water management and associated engineering. The ‘Delta Works’, built to protect the Zeeland region, comprises dams, dikes, locks, sluices and a storm surge barrier. Taking several years to construct, the Delta Works includes the world’s largest surge barrier and is widely regarded as a triumph of engineering.
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The dial – its purpose is clear
The dial of the Grönefeld 1969 DeltaWorks presents the essentials of time, namely, hours, minutes and seconds. There is nothing superfluous. In fact, when designing the watch, Bart and Tim were keen to ensure that the dial imparted information in a clear, intelligible format.
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While the dial is highly practical it is still enriched with numerous details. For example, the hour track sits on a higher plane than the central dial area and small seconds display.
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A watch for all occasions
The Grönefeld 1969 DeltaWorks is presented in a 45mm stainless steel case, measuring 12.5mm in height. The case features an integrated strap that ergonomically encircles the wrist, conferring a high degree of wearer comfort while appearing smaller than its stated dimensions would suggest. The scale of the case endows the watch with a generously proportioned dial area, augmenting legibility but without appearing unduly large. Every aspect of the case has been carefully considered.
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A triple-seal, screw-down crown mitigates the risk of dust or water ingress. In addition, the crown features an ingenious safeguarding system. When the Grönefeld logo on the crown is perpendicular to the dial and pointing upwards, the triple-seal, screw-down crown delivers maximum protection. The sapphire crystals, to the front and rear, are thicker than normal and, by default, stronger. As a result of the aforementioned details, the watch is water resistant to 100m, making it suitable for an array of leisure pursuits, including swimming, sailing and windsurfing.
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The 1969 DeltaWorks is offered in an array of different coloured rubber straps. Grönefeld has selected FKM rubber in preference to conventional rubber as it proves more supple, more resistant and it retains its colour for longer. The exterior of the strap features a wave pattern, while the inside of the strap is decorated with a motif formed of numerous Grönefeld logos, allowing the wearer’s wrist to breathe. The strap can be cut to length for optimal sizing, while the micro adjustable clasp, featuring gleaming facets and relief engraving, allows the wearer to fine tune the union between the strap and the wrist.
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The aforementioned pane of sapphire crystal, positioned to the rear of the watch, affords views of the beautifully appointed, self-winding movement. The case back features ‘GRÖNEFELD’ and ‘DELTAWORKS’ in relief, while the name ‘Oldenzaal’ is discretely engraved opposite the crown, an elegant reminder of where the Grönefeld family’s watchmaking story began.
The movement – no compromises
When conceiving the 1969 DeltaWorks, Bart & Tim were keen to ensure the watch was suitable for daily wear and compatible with an active lifestyle. With this in mind, they decided it must feature a self-winding movement encompassing the same exalted finishing as other Grönefeld timepieces.
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Brand devotees may recognise the calibre G-06, an automatic movement first used within the company’s 1941 Principia Automatic. However, while many elements have been carried over to the 1969 DeltaWorks, there are some additional details which enhance robustness, imbuing this version with its own distinctive character.
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For instance, a notable feature specific to this model is the distinctive oscillating weight. The openworked architecture features four stainless steel arms, presented in a double-spoke design. These arms are connected to an 18K gold mass adorned with a wave motif. Each of the four arms is positioned beneath the gold mass and projects beyond, sitting above a circular ledge. Should the watch be subject to a sudden shock, the elongated arms will prevent the oscillating mass touching the inside of the sapphire crystal or striking the bridges below.
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The movement is intended for the most discerning watch collectors. The rotor is completely hand finished and turns on ceramic ball bearings, preventing wear and eliminating the need for lubrication. Meanwhile, the stainless-steel bridges replicate the façades of traditional Dutch houses, termed ‘bell gables’. Each bridge features a micro-blasted central section, framed with a hand-bevelled gleaming edge. Some of the bridges also feature relief engraving. Each movement is fitted with a plate engraved with ‘ΔW’ (signifying DeltaWorks) along with its unique movement number.
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The Grönefeld 5-arm, double spoke gear train wheels exhibit a contemporary character, but their circular grained surfaces pay due reverence to fine watchmaking tradition. Their design, as well as the bevelled escape wheel teeth, prevent the oil from dissipating, thereby mitigating wear. The free-sprung balance mitigates positional influence and delivers superior rate stability. The escapement is adjusted to heat-cold, isochronism and six positions.
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Gold chatons stand testament to the no-compromise specification of this movement. In addition, the mirror polished screws feature chamfered rims and slots. Numerous surfaces gleam, courtesy of the mirror-polishing which has been patiently executed by time-served hands. The inventory of different decorations includes snailed, grained, spotted and frosted surfaces, indulging the desires of purists.Click, to see the large size. ▶ BIG FOTO 
A remarkable choice
When conceiving this watch, Bart & Tim wanted to produce a model that indulged purists with a remarkable choice of colours and styles. The 1969 DeltaWorks is available with 3 different dial designs/colours, 5 different strap options and, finally, a choice of stainless steel inserts or colour-coordinated FKM rubber-clad inserts.
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Technical Specifications
Model: GRÖNEFELD – 1969 DeltaWorks
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Movement
| Calibre | G-06 | |
| Movement Dimensions | Diameter: 32.0 mm Thickness: 5.5 mm |
|
| Number of Parts | 231 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. 18 karat solid gold segment. Stainless steel centre pivoted on a high precision ceramic ball bearing to avoid excessive wear. To prevent damage to the movement and winding mass the extremities of the 4 arms are extended and guided by the case and case-back | |
| 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 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
| Number of components | 68 parts |
| Dimensions | Diameter incl. case inserts: 44.5 mm Diameter bezel: 43.3 mm Thickness: 12.5 mm Lug to lug: 53 mm |
| Water Resistance | 10 atmospheres – 100 meters – 330 feet |
| Material | Stainless steel AISI 316L (1.4435) |
| Crown | Screw down crown. Triple gaskets with upright logo |
| Hands | Flame-blued or polished steel extended Lancette hands with blue light emitting Super-LumiNova® Grade X1. Small poised seconds hand |
| Strap | Integrated FKM rubber strap available in black, olive, blue, white or orange |
| Clasp | Stainless steel 316L micro adjustable (7 increments over 9mm). Embossed Grönefeld and logo engraving. Opening must be done by operating both push buttons at once |
| 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 |
| Total Weight | 135 Grams |
Dial and Strap
The 1969 DeltaWorks is available with 3 different dial designs/colours, 5 different strap options and, finally, a choice of stainless steel inserts or colour-coordinated FKM rubber-clad inserts.
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🔴Price: Recommended retail EUR 49.800 💰
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