The Universal triode from Myers is of double ended construction to reduce inter-electrode capacitances and was a successful product. This exhibit is of the earliest form of construction. It was also known as the RAC-3 and is a bright emitter. It was later superseded by the dull emitter Dry Battery valve.
The image shows the valve mounted on the RAC3 base. The base clearly states which way the valve should be inserted and what the connections are.
This box shows the Jersey City address.
This image shows the box for the base unit.
Thanks to Joe Gruber for sending the images.
The thin glass tube envelope is 16 mm in diameter, and including the base pins is 85 mm tall.
References: Joe Gruber, 1047 & 3002. Type Universal was first introduced in 1922.