JLC Mk 11 6b/346 Current Collection which is a robust and

which is a robust and reliable performer

The mechanism releases the weight when the mainspring has run out a bit of power

The watch is in fantastic condition

to quote the original Ministry of Defence specification

JLC Mk 11 6b/346 Current Collection which is a robust andThis is a rare and desirable Mark 11 navigators wrist watch, made by Jaeger LeCoultre. The original Ministry of Defence specification describes this watch as, The wrist watch Mk. 11 is a highly accurate time piece suitable for astro navigation purposes. This watch was used by the navigator in an RAF plane in conjunction with a bubble sextant to calculate the exact latitude and longitude of the aircraft. This method was in principal the same as that