Mouse over the image below... the CD81 Nixies are in the foreground.

IN14 Nixies.

• Made in the the old soviet union (USSR).
• Digit height=18mm. Tube Height=54.5mm including tip.
• Russian quality! Note the 2 is an inverted 5, or visa versa!

CD81 Nixies.

• Made in Japan by Hitachi (circa 1954).
• Digit height=12mm. Tube Height=36mm including tip.
• Japanese quality! Although the CD81 tubes are smaller, they are much sharper.

Sphere's Nixie Tube Page has a lot of nixie tube information and data.