More than forty years have passed since the introduction of the original and this now classic timepiece, is more popular than ever. Originally unveiled in the mid-1970s and designed by the legendary , the Nautilusref. 3700/001A has become a veritable horological icon thanks to its pioneering role amongst high-end, luxury sports watches, withonly 3,300 examplesestimated to have been produced.The reference 3700 Nautilus is often referred to as Jumbo, on account of its relatively imposing size for the period.

History of the Nautilus

The early 1970s was a time of great change within the watch industry. At the time of its release, the world was already shifting towards highly-commercialised, quartz watchmaking. In 1969Seiko launched the first quartz wristwatch, and its success drove the mechanical watch industry to critically low levels of production by the early 1980s.

Furthermore, the concept of a luxury watch in steel was a truly revolutionary idea. In 1976, the introduction of Patek Philippes Nautilus firmly altered the direction of luxury sports watch design offering a true competitor to Audemars Piguet's then four-year-old ,equally designed by Mr Genta. The Nautilusoffered a different take on the idea of a luxury sports watch, though - like the Royal Oak- it was made in stainless steel for the standard version.

The ref. 3700/001A was not only unprecedented in its design, but also inits initial pricing to consumers. When the Nautilus was released, the retail price for the watch was $3,100 - considerable for the time, and comparable to many of Patek Philippes gold dress watches.

The design

Remarkably, Gerald Genta is said to have sketched the 3700s design whilst dining meters away from executives. His five minutes of work, is today considered one of the masterpieces of modern design. Its etymology comes from Jules Vernes novel Twenty Thousand Leagues Under the Sea, after the Nautilus submarine, used by Captain Nemo.

Like the Royal Oak, the Nautilus water-resistant technology (120 meters) required innovative strategy. Gerald Gentas inspiration for the iconic Nautilus architecture was to replicate that of the secure porthole windows, found on transatlantic ocean liners, complete with a two-piece, solid mono-block and octagonal bezel, secured by four lateral screws (concealed at 3 and 9 oclock), holding the case tightly together.

An early 3700 example

This steelNautilus 3700/001A watch is the perfect balance between utilitarian function and elegant design. The case and bracelet are excellently finished, with beveled, polished and granular surfaces. The all-original bracelet (witha full complement of links) has little tono stretch. At 42mm in diameter, and only 7.6mm thick, the 3700 case is a beautiful twist of perspectives and size. The inner-case-back correctly displays the watchs unique serial number, as well as the reference number 3700/1, below the manufactures signature. The underside of the hinge-inspired 'ears' (located at 3 and 9 o'clock) also display a 3-digit serial number, appropriately matching the last 3-digits on the inner case-back.

The hand-made, ridged dial, manufactured by Stern Frres, displays horizontal grooves. Over time, the dial has developed a very subtle green colour, displaying a gradient of greenish-grey tones throughout. Such variances in dial colour are most commonly associated with "Type 6" and "Type 7" dials, which have previously been documented to show ranges from sea-green to tones. This example is "Type 7", distinguished by thetwo dots on the outer side of the () symbol, consistent with examples produced from the 1980s.The applied hour markers are original tritium-filled, with dot outer-minute divisions, original polished baton-hands (with luminous inserts) and a date aperture at 3 oclock (with original date-disc). With this example, the index-markers are manufactured from white gold, indicated by the lower case Greek letter sigma at the bottom of the dial.

The bracelet

Two versions of the Patek Philippe Nautilus 3700 existed, carrying the references 3700/001A and later, the ref. 3700/011A - with two subtle variations in bracelet design. The links of the ref.3700/001 are noticeably-wider and straighter than the ref. 3700/011A, which featured a more exaggerated bracelet taper. Further to this, the bracelets found in earlier examples (like this 3700/001A) have fewer links, owing to each individual links larger size). The steel 3700/001A (with larger bracelet) was produced from 1976-82. The clasp of this 3700/001A bracelet corresponds to laterexamples of the 3700/001A (from 1977 onwards), where Nautilus is engraved alongside PATEK PHILIPPE GENVE, STEEL INOX, and SWISS MADE.

The movement

The Nautilus 3700/001A is powered by the ultra-slim calibre 28-255C, derived from Jaeger-LeCoultres legendary ultra-thin JLC 920 calibre movement. The caliber 2121 was based on the caliber 2120, an initial project of Jaeger-LeCoultre in 1967, funded and contributed to by Patek Philippe, and famous for its adoption by Audemars Piguet, Patek Philippe and (found in the Royal Oak 5402 and VC 222). The 28-255C calibre features Patek Philippe's famedfree-sprungGyromaxbalance, with four ruby wheels to support the full-diameter rotor, which runs on a beryllium rail for stability. The solid-gold rotor is finished in classic Patek Philippe style, with circular Geneva stripes. The Patek Philippe calibre 28-255C remains one of the thinnest full-rotor self-winding movements in the world, considered by many as one of the most stunningly refined and technically impressive wrist-watch movements ever made. Importantly, its movement serial number (1.309.XXX) corresponds with its year of production.

The set

Closer look