Tonight on eBay we listed a military water purification from the mid 1960’s. Definitely an interesting item, smack bang from the middle of the Vietnam War era.
Check it out here – http://www.ebay.com.au/sch/20thcenturysalvation/m.html?_nkw=&_armrs=1&_from=&_ipg=&_trksid=p3686