This exhibit is an Electrad Diode fitted into a base also made by Electrad. This is a soft diode and thus is not gettered.
We also have the gettered hard version here.
The original box.
Thanks to Joe Gruber for sending the images.
The thin glass tube envelope is 19 mm in diameter and, including the base pins, is 83 mm tall.
Reference: Joe Gruber.
Updated November 26, 2020.