This object is hand constructed from a 4.5 in x 7.5 in x 2.5 in deep plastic utility box. A 14-segment B-7971 Nixie tube from Burroughs with a 2.5 inch display is mounted on the removable cover toward the front of the box; it isn't mounted in a socket, but rather the pins of the tube go through holes drilled in the cover. "Ultronic Systems Corp" is printed in white ink on the back of the tube. A power cord with a standard 2-prong plug extends through a hole drilled in the back of the box; it is 29 in long and is spliced in the middle with green plastic tape. A round 5-pin female connector with a keyway is mounted to the right of the power cord.
Identifying Numbers
Model number
B-7971
Printed in white ink on the glass envelope behind the display structure.
Other number
283CQAD7971
Printed in white ink on the glass envelope behind the display structure.
Other number
6625
Printed vertically in white ink on the glass envelope behind the display structure.
Other number
E14
Printed vertically in white ink on the glass envelope behind the display structure.