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拍品专文
This stunning and extremely rare Longines steel reference 4270, is called ‘Pulsanti ad Ombrello’ by collectors due to the shape of the chronograph pushers. The present watch is stamped with order no. 2352, one of only around 10 known examples with this order number. The large diameter of 37.5 mm., superb aesthetic and flyback function of the chronograph makes this reference the perfect choice for today’s collectors as a wearable classic. The present watch is highly unusual with its grey and black two-tone dial and is undoubtedly one of the rarest variations of this most desirable of vintage Longines chronographs.
The extremely beautiful dial was made by either Stern Frères or Flückiger & Cie., the best dial manufacturers of the period, it shows no signs of any restoration or intervention and the luminous numerals and hands are well preserved and have aged naturally over time. Whilst the case back is punch-numbered 2352, this number is the ‘order’ number and not the reference number which is 4270, different variations of the model having different ‘order’ numbers. Close inspection shows that there is also an additional number ‘49’ punched on the caseback and the back of one lug. This number is the Longines ‘waterproof pairing’ number, used in order that the correct cases and casebacks were put together during assembly.
The Longines reference 4270 chronograph is in many ways the ancestor of the modern wristwatch chronograph, in particular it is noted for being waterproof. The challenge in making a waterproof chronograph was to make the chronograph buttons watertight even during operation. Longines achieved this successfully and Swiss patent 201681 was granted on 15th December 1938.
The movement is the in-house caliber 13ZN, legendary among Longines collectors, it was made between 1926 and 1951. Although Longines had used the ‘flyback’ chronograph mechanism before, the 13ZN was the first of Longine’s calibers that was patented for use with ‘flyback’ function, the patent was registered on 16 June 1936.
The extremely beautiful dial was made by either Stern Frères or Flückiger & Cie., the best dial manufacturers of the period, it shows no signs of any restoration or intervention and the luminous numerals and hands are well preserved and have aged naturally over time. Whilst the case back is punch-numbered 2352, this number is the ‘order’ number and not the reference number which is 4270, different variations of the model having different ‘order’ numbers. Close inspection shows that there is also an additional number ‘49’ punched on the caseback and the back of one lug. This number is the Longines ‘waterproof pairing’ number, used in order that the correct cases and casebacks were put together during assembly.
The Longines reference 4270 chronograph is in many ways the ancestor of the modern wristwatch chronograph, in particular it is noted for being waterproof. The challenge in making a waterproof chronograph was to make the chronograph buttons watertight even during operation. Longines achieved this successfully and Swiss patent 201681 was granted on 15th December 1938.
The movement is the in-house caliber 13ZN, legendary among Longines collectors, it was made between 1926 and 1951. Although Longines had used the ‘flyback’ chronograph mechanism before, the 13ZN was the first of Longine’s calibers that was patented for use with ‘flyback’ function, the patent was registered on 16 June 1936.