Vacuum type 816
||Printed on the tube and on the top of the box
||Pirnted in silber on the black base of the tube below the "where made" information.
||Printed in silver on teh side of the tube
overall: 5 1/4 in x 2 in x 2 in
Vacuum tube with 4 pins and a metal cap connetor. It is housed in the its original packaging.