Details
MANUFACTURED: 1979
MOVEMENT NO: 1'307'423
CASE NO: 538'699
CASE MATERIAL: Stainless steel
CASE DIAMETER: 42 mm. wide
BRACELET MATERIAL: Stainless steel
BRACELET SIZE: Approx. 170 mm. overall length
DIAL: Blue, "Type 1B"
MOVEMENT: Automatic
FUNCTIONS: Date
BOX: No
PAPERS: No
WITH: Patek Philippe Extract from the Archives confirming production of the present watch in 1979 and its subsequent sale on 6 June 1980
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Lot Essay

The present timepiece is a well preserved example of the classic reference 3700/1 'Jumbo' featuring a charismatic 'type 1B' dial.

The Dials of Nautilus reference 3700/1
Created by Stern Frères, the distinctive striped dials of the Nautilus were entirely hand-made – each line recess is engraved separately. To achieve the aptly named 'gray depth of ocean' color specified by Patek Philippe the dials were painted alternately black and blue several times and then covered with a protective "Zapon" varnish. Early examples often display a degradation of the varnish so that depending on how a watch has been stored over the years, an individual dial may have tropicalized more towards either blue, gray, chestnut or green.

The indexes and hands are made of gold (sometimes erroneously called “steel” on some Extracts from the archives) and filled with luminescent material. The Patek Philippe signature and the outer minute divisions were painted. Below the 6 o’clock index is the word “Swiss” flanked on each side by the "Aprior" mark of two sigma symbols. The Aprior mark was conferred by the "Association pour la Promotion Industrielle de l’Or" on dials made of solid gold or at least with solid gold indexes.

The Nautilus Waterproof Case Ref. 3700/1
The case patent design of original Nautilus, reference 3700/1 was registered on 23rd April 1976. Made for Patek Philippe by Favre-Perret SA, Le Crét du Locle, from 1976 until 1981 when production was transferred to Patek Philippe's own Ateliers Réunis workshops. It comprises two parts, the main body and the bezel, at each side is an "ear" which couples with a corresponding flange, the two parts are secured by lateral screws. A rubber seal sits between the bezel and case body and is thus compressed when subject to water pressure forming a perfect watertight seal. The reference 3700/1 was made in stainless steel, steel and gold, 18K yellow gold, 18K white gold and platinum.

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