Hello,    As a 'Newbie' I'm browsing the net to discover technics , guidelines etc. on my new hobbie. I found that document from US war department dating 1945 about : 'Ordnance maintenance for Wrist watches' ...as you'll notice it's also an introduction manual for vintage watches, and some american watch models Looking at it, I thought to myself how lucky we're to have internet and online courses ... P.S : name of the attachment, is the official document name in US army