There are a few pictures on this forum of black-dialed Quartermasters...
Mar 14, 2018,18:06 PM
...here's Blomman's example now:
But I suspect that you want something a little more "tangible". I've linked this thread over to another forum where you are a member. Someone over there found an auction listing for Gus Grissom's LeCoultre, which was sold about 10 years ago. So now we have 4 examples, all owned by Mercury astronauts. Sense a trend here?
I highly doubt that Jaeger-LeCoultre would have any records about these watches. At the time, LeCoultre watches were distributed in the US by Longines-Wittnauer Co. of New York. The US side of the venture was sold to Westinghouse in the late 1960's The latest date I can find any evidence of L-W's existence was 1994. At that time, Longines was sold off to (what evetually became) Swatch and Wittnauer became independent for a time.
My guess is that these watches came about by mating the K831/CW caliber used for the Quartermaster, with an American made steel case and dial.
I do not know whether these were specially made for NASA at their request, or put together by Longines-Wittnauer.