Mark xi raf-issued british military watch. The watch has been fitted with a stainless. Steel bracelet with a measurment of 18.5 cm. This rare, vintage military Jaeger LeCoultre Mark 11 in stainless steel is in fantastic condition and has perfect mechanical functionality. This incredible watch has been fully serviced and is guaranteed for authenticity.
The 35mm stainless steel case features long lugs, fixed bars, screw-down caseback and a domed plexiglass, all following the specifications of the MoD. There were variances in the hands Jaeger-LeCoultre used, with this example coming with stunning cathedral hands.
The caseback features all of the correct engravings as designated when issued. Mark XIs were made for BOAC British Specific to this example, it is from 1948 as shown by the caseback designation /48. The dial is in exceptional unrestored condition, with its luminous material aged to a nice orange patina.
The text remains crisp and white. There are some minor scratches to the case back and plexiglass that is expected, given the age of the watch.One of the important characteristics of the Mark 11 was its need to be highly antimagnetic, achieved through the iron dial and iron dust cap, which creates a Faraday cage, protecting the movement from magnetic fields. Inside the watch, is perhaps its most impressive aspect, the JLC Calibre 488/SBr - a chronometer grade movement with a hack device and centre seconds.
It is rhodium brass finished with Geneva stripes. It was the precursor to the famously accurate Geophysic movement, released in 1958.
The movement itself is marked with the British Broadarrow, and is distinctive in its look with its stop lever. The Jaeger LeCoultre Mark 11s were renowned for their timekeeping accuracy, as this was a fundamental specification required by the British Armed Forces.
As a result, these watches were regulated in five positions and tested in temperatures ranging from -5 degrees to 46 degrees over a 44-day testing period. This was conducted in the chronometer workshop of the Royal Greenwich Observatory in Herstmonceux. The item "Jaeger lecoultre MK11 Cal 488.Sbr Faraday cage One Year Warranty Circ 1948" is in sale since Tuesday, August 28, 2018. This item is in the category "Jewellery & Watches\Watches, Parts & Accessories\Wristwatches". The seller is "time2timepiece" and is located in Glasgow. This item can be shipped worldwide.