Grand Prix Professional Racing Watch on Tropic Strap – Cunningham C4-R 1952 Limited Edition
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This Grand Prix Professional racing watch features a blue sunray dial with C3 Super-LumiNova®, a highly legible arrow shaped second hand, a Hesalite glass and a stainless steel case water resistant to 100m.
This automatic watch - powered by the Japan made automatic movement Citizen/Miyota 8315 with a 60-hour power reserve (approx.) - is presented on a dark blue rally Tropic rubber strap.
SKINDIVER WT PROFESSIONAL OVERVIEW
CUNNINGHAM C4-R - LE MANS 1952 - LIMITED EDITION CASEBACK
The Grand Prix Professional - Cunningham C4-R 1952 Limited Edition - is secured with a screw-down caseback and the first 952 pieces come with a limited edition caseback.
The special casebacks of these racing watches are individually numbered and feature, along with the technical markings, a deep engraving with enamel of the proverbial moto “THE PROOF IS IN THE RACING” and the 1952 Le Mans race winning car of its category, the Cunningham C4-R number 1.
SKINDIVER WT PROFESSIONAL OVERVIEW
THE C4-R N°1
In June 1952, after 24 hours of muscular driving, the C4-R spider – masterfully held for 20 hours by the flamboyant entrepreneur and “gentleman driver” Briggs Cunningham himself, as well as Bill Spear – ended the intense and legendary Le Mans race and won the class victory for cars over 5 liters.
C4-R N°1
CLASS S 8.0 WINNER
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LE MANS 1952
SKINDIVER WT PROFESSIONAL OVERVIEW
THE FIRST TO WIN THE INAUGURAL ROUND OF THE FIRST WORLD SPORTSCAR CHAMPIONSHIP
The victory at Le Mans of the C4-R Number 1 was a stylish preamble for the racing car which a year later would become the first to win the inaugural round of the very first World Sportscar Championship in Sebring, Florida.
GRAND PRIX PROFESSIONAL - C4-R 1952 - lIMITED EDITION OVERVIEW
• AUTOMATIC MOVEMENT
60h power reserve / Hacking-second
• HESALITE GLASS
High impact resistance & transparency / Low reflection
• STAINLESS STEEL CASE
Ø 40MM / 316L stainless steel
• 3 CHOICES OF STRAPS & BRACELET
Italian vegetable tanned leather strap / Rally Tropic rubber strap / Metal bracelet
• WATER-RESISTANCE
100M≈10ATM
• SWISS SUPER-LUMINOVA®
C3 Super-LumiNova® on all hands and indices
• UNI-DIRECTIONAL BEZEL
120 clicks / 60 graduations
• ASSEMBLED IN FRANCE
Hand-assembled / Regulated to ±15 seconds per day
• AUTOMATIC MOVEMENT
60h power reserve / Hacking-second
• HESALITE GLASS
High impact resistance & transparency / Low reflection
• STAINLESS STEEL CASE
Ø 40MM / 316L stainless steel
• 3 CHOICES OF STRAPS & BRACELET
Italian vegetable tanned leather strap / Rally Tropic rubber strap / Metal bracelet
• WATER-RESISTANCE
100M≈10ATM
• SWISS SUPER-LUMINOVA®
C3 Super-LumiNova® on all hands and indices
• UNI-DIRECTIONAL BEZEL
120 clicks / 60 graduations
• ASSEMBLED IN FRANCE
Hand-assembled / Regulated to ±15 seconds per day
GRAND PRIX - C4-R 1952 - LIMITED EDITION OVERVIEW
• AUTOMATIC MOVEMENT
60h power reserve / Hacking-second
• HESALITE GLASS
High impact resistance & transparency / Low reflection
• STAINLESS STEEL CASE
Ø 40MM / 316L stainless steel
• 3 CHOICES OF STRAPS & Bracelet
Italian vegetable tanned leather strap / Rally Tropic rubber strap / Metal bracelet
SKINDIVER WT PROFESSIONAL X-15 LIMITED EDITION OVERVIEW
• WATER-RESISTANCE
100M≈10ATM
• SWISS SUPER-LUMINOVA®
C3 Super-LumiNova® on all hands & indices
• UNI-DIRECTIONAL BEZEL
120 clicks / 60 graduations & 12 world cities / time zones
• ASSEMBLED IN FRANCE
Hand-assembled / Regulated to ±15 seconds per day
SKINDIVER WT PROFESSIONAL OVERVIEW
DEPENDABLE & SOLID RACING WATCH
• Tachymeter scale and rotating bezel to measure average speed and elapsed time
• Hand finished brushed 316L stainless steel case
• Glass box Hesalite glass
• Drilled lugs for easy strap changes
• Water resistance: 10 ATM / 100m
AUTOMATIC MOVEMENT: JAPANESE RELIABILITY & QUALITY
Citizen / Miyota 8315 Automatic (Self-winding mechanical):
• 60 hours power-reserve
• Hacking-second
In-house modifications and operations:
• Disassembly of the date disk to make the movement "No date"
• Control and setting with a tolerance of ±15 seconds and a beat error of 0,6ms
TACHYMETER:MEASURE AN AVERAGE SPEED
How to use the tachymeter to measure the average speed of a car between two points at 0km (A) and 1km (B)?
1. When the car passes the point A, start timing with the bezel by placing the 12:00 o'clock arrow of the bezel at the time the second hand is / was.
2. When the car passes the point B, read the elapsed time in seconds on the bezel. For instance, 20s.
3. Rotate back the bezel to 0 and read on the tachymeter scale the speed matching the elapsed time from step 2. For instance, if a car passed the point B at 20s you can read 180km/h on the tachymeter scale, so the car had an average speed of 180km/h between the point A and the point B.
SKINDIVER WT PROFESSIONAL OVERVIEW
HESALITE GLASS: THE PRO’S CHOICE
From the 1960s and earlier, armed forces around the world along with NASA issued wrist-watches secured with Hesalite glasses to service men, pilots and astronauts. Why? Hesalite offers high transparency, strong impact resistance and do not shatter like glass or sapphire would.
To this day, above or under the ocean, in a cockpit, or even in space, the possibility of having tiny bits of glass floating around or having the face of the watch exposed to the elements is considered an unnecessary risk and a direct threat to mission success.
SKINDIVER WT PROFESSIONAL OVERVIEW
ASSEMBLED IN FRANCE
Like Wolbrook and Douglas watches back in the 1960s, the Grand Prix racing watches are carefully assembled by professional and trained watchmakers in France, nearby Besançon.
The movements are customized – removal of the date disk in the case of the Grand Prix Professional - and regulated by our watchmakers.
THE GRAND PRIX PROFESSIONAL - C4-R 1952 - LIMITED EDITION IN "MM"
40mm diameter x 48mm lugs to lugs x 13mm thickness / 20mm lug width
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