United States Military Standardすなわち米軍ML規格に相当するものですが、別名MIL-STD, Defense Standardとも呼ばれます。JAN-CEA-5839の状態は元箱入り新品未使用品です。JAN-CEA-5839 2本の内1本は1960年、もう1本は1961年に箱詰めされました。本体は新品未使用ですが、元箱は経年変化で変色しています。一個の箱の蓋が破損していましたので、補修してあります。最近はJAN規格真空管は市場での価格が高騰しています。写真をご覧頂き、ご判断下さい。United States Military Standard, also known as MIL-STD, Defense Standard. Also known as MIL-STD, Defense Standard.JAN-CEA-5839 is in new, unused condition in its original box.One of the two JAN-CEA-5839s was boxed in 1960 and the other in 1961.The body is new and unused, but the original box is discolored from age.The lid of one box was damaged and has been repaired.JAN standard vacuum tubes have been going up in price in the market recently.Please see the photos and make your own decision.