Back hooks for Molly system web belt attachment. Bit of small distress on the flap, overall sturdy and could serve today. Interesting insignia, USMC EGA but no globe, I noticed that and thought it might be Navy but I suppose you can only do so much with a marker. Korean lettering but likely post-war, may well have been used during Vietnam. Might have some serious sleeper value for your collection. But remember "they also serve who dig the privvy". Standard dull drab green, I turn the lights up for photos.