This record contains two parts from a single channel tube. They are circular with five pins and four circular indentations on the bottom. The top of both parts has a square reflective component. One of the parts has several thin metal wires wrapped around the pins found on the bottom of the part. The ends of the wires are wrapped around separate pins.
Identifying Numbers
Other number
319
Hand etched onto the bottom of the part with the wires
Other number
349
Hand etched onto the bottom of the part with no wires