These C-1 survival jackets were originally made for the US Army Air Forces (USAAF), precursor of the US Air Force, during WW2 (source: https://www.usmilitariaforum.com/forums/index.php?/topic/17639-wwii-c-1-sustenancesurvival-vest/&do=findComment&comment=1429229). Many were used into the Vietnam War (mid-1960’s; source: https://www.usmilitariaforum.com/forums/index.php?/topic/362359-modified-c-1-emergency-sustenance-vest-with-erdl-pocket/&do=findComment&comment=2874314).
Tag and Stamp:
Pockets have intended contents printed on pocket flaps.
Modified ERDL Pocket:
The pocket was taken from a uniform, likely a jungle fatigue and crudeky hand-stitched over where a pocket would have been in an unmodified C-1.
Holster is canvas with leather strap and body side backing.