The CD25 is a medium sized end-view nixie tube made by the company Rodan-Okaya. Rodan are known for making the largest (and some of the strangest looking) nixie tubes in the world. This tube is similar in size to the IN-12, with the same pin-out.

Digit size 19mm
Min current 1.5mA
Max current 3.5mA
Base TSR-11P

Here are some photographs of the tube from various angles.

CD25 data

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