Age unknown. This is a MODEL X, INSTANT FYR FYTER extinguisher. The weight is 48 lbs, leadig me to believe it is not empty. Underside has the carrying handle once it is turned upside down. Looking at the RED cap on top it is higher then the ring at the top. I assume that when you tip it upside down and put weight on it, it then charges the extinguisher ( if working properly). I cannot verify that this is a working extinguisher only that it appears to be in very good shape. The white tag attached reads...charged 10/30/68 Provo Fire Dept, other side is signed E Saggr or Jaggr,,,,not sure which it is.