Preserved in extremely good original condition with beautiful black sigma dial this rare example of the steel and gold 3700/1 “Jumbo” is further enhanced by the presence of the original iconic Nautilus cork box and original certificate of origin.
The steel and gold version of the Nautilus “Jumbo” is a rare and collectible watch, only approximately 600 examples were made with the larger size bracelet.
Patek Philippe automatic movement caliber 28-255
Another of the many attractions of the Nautilus Ref. 3700/1 for the watch aficionado is that from the very beginning it was fitted with what is generally agreed to be one of the great watch calibers – the 28-255. Based on the original Jaeger-LeCoultre caliber 920 of 1967 it is regarded as one of the most beautiful and refined automatic movements ever produced, crucially it is also very thin at only 3.15 mm., therefore highly appropriate for the slim and elegant Nautilus. The development of the caliber 920 was partly jointly financed by Patek Philippe, Audemars Piguet and Vacheron Constantin. Audemars Piguet fitted their version, now the revered caliber 2120 into the Royal Oak, a further shared familial link with the Nautilus. Vacheron Constantin’s version became their caliber 1120.
The caliber is 12.5 lignes and has 36 jewels and 19,800 vibrations. It is supplied with the shock-protected free-sprung Gyromax balance with eight rotatable weights allowing rate adjustment without the need for a conventional regulator index. The winding rotor is formed from a beryllium ring with 21K gold rim, this clever design with four additional ruby rollers to support the rotor around its periphery allows the thinness of the movement to remain uncompromised.
In 1981 to coincide with the launch of a new Nautilus reference, the mid-size 3800/1A, Patek Philippe introduced its own new slim automatic caliber, the 335 SC with centre seconds feature.