I have over 300 JLC/LC ads in my library + I don't know how many catalogues...
LeCoultre watches from the same time like the Worldtimer, Master Mariner Chronometre, Galaxy.... I have several documents...
But I have never seen one single document on the Quartermaster!
To find a Quartermaster in good condition may take awhile...
I think I saw maybe 10 in various condition in the last 10 years.
Inside is the Cal K831/CW - only arround 2500 movements were ever made.
Guess no one really knows how many became complete watches.
Best
Blomman