Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result Oyster Speedking 'Kew A Certificate', Ref: 5056, Circa 1947

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Lot 21
Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result
Oyster Speedking 'Kew A Certificate', Ref: 5056, Circa 1947

Sold for £ 17,500 (US$ 23,988) inc. premium
Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result
Model: Oyster Speedking 'Kew A Certificate'
Reference: 5056
Date: Circa 1947
Movement: Jewelled gilt manual wind, inscribed Kew A tested, large jewels to centre, escape wheel and balance with end caps, freesprung compensated balance with timing screws, No.4215
Dial: Silvered, gilt Arabic numerals, black outer minute track, subsidiary seconds at 6, blued steel pointed baton hands
Case: Brushed and polished tonneau form, screw down back and crown, No.629***
Strap/Bracelet: Brushed Oyster rivet link, No.349
Buckle/Clasp: Signed folding clasp
Signed: Case, dial & movement
Size: 30mm
Accompaniments: 2 spare links, with copies of the Kew Registers showing the especially good rating

Footnotes

  • The Kew A Certificate watches are some of the rarest series watches made by Rolex. Since every one was numbered and listed separately, we know exactly how many were produced and that only 136 successfully passed through to attain the coveted 'KEW A' Certificate. The test is carried out over 45 days and includes temperature fluctuations and was designed by the Royal Navy for ship's chronometers. Of the total number submitted only 16 obtained the especially good classification meaning they obtained over 80 points. The present example 4215 is such a watch.

    Rolex made a very special effort to obtain these results and the watches were specially made for the tests. Using a 10-1/2 ligne 700 calibre base movement, unusually in pink gilt, with a completely re-calibrated escapement and reworked nickelled balance bridge. They used a Nivorox freesprung and exceptionally fine balance with a Breguet overcoil creating the calibre known to Rolex as the 720. This project was overseen by one of the best 'regulators' of the time, Jean Matile, who obtained various records from 1925, including the Neuchatel best ever result for a wrist watch with 8.4 points and the astonishing 93.8 points at Kew also for a wristwatch movement.

    The movement 4215 is one of the renowned watches that not only passed first time but also attained the 'Especially Good' distinction. It passed on the 24th of June 1947. At the time this passed and was cased there was a public thirst for watches with exceptional timing results. Rolex took out many adverts at the time to emphasise their ability to create wristwatches with such distinction as normally this was only found in larger pocket and deck watches. Being seen to be able to get the top classification in a UK test meant the majority of these were sold in the UK.
Contacts
Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result Oyster Speedking 'Kew A Certificate', Ref: 5056, Circa 1947
Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result Oyster Speedking 'Kew A Certificate', Ref: 5056, Circa 1947
Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result Oyster Speedking 'Kew A Certificate', Ref: 5056, Circa 1947
Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result Oyster Speedking 'Kew A Certificate', Ref: 5056, Circa 1947
Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result Oyster Speedking 'Kew A Certificate', Ref: 5056, Circa 1947
Rolex. A very rare stainless steel manual wind bracelet watch with Kew Certification and 'Especially Good' result Oyster Speedking 'Kew A Certificate', Ref: 5056, Circa 1947
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