Vintage Mullard CV181 ECC32 Vacuum Tube NOS NIB British Military Issue 1950's Rare.  The lower etched code near the base is "H3" I believe this is 1953 but not sure - buyer to decide for themselves regarding manufacture date. If you are looking to replace a 6SN7 type tube please check with your tech - it isn't always a direct replacement. THis comes with all the original packaging.  The box is a little scuffed up and there are some numbers written on the side but all the pieces are there. tests NOS strength both sides guaranteed using Sencore TC136 tester with no leaks/shorts. This rare piece is guaranteed as described and to your satisfaction. Shipping in continental USA is $5. I will ship internationally for $23.