This version of the Solenoid valve is a production sample and the construction differs slightly from the earlier valve.
This box was used for this valve - an indication that the company was using up old stock. Like other boxes this measures 50 mm square and 128 mm tall.
Thanks to Joe Gruber for sending the images.
The balloon envelope is 44 mm in diameter and, excluding the UV base pins, is 104 mm tall.
Reference: Joe Gruber.
Updated August 04, 2020. shape:balloon construction:pinch type:triode age:pre.1920 base:uv pins:4 pin:1.g1 pin:2.f pin:3.f pin:4.a