The G10/241E is a neon-filled Nomotron made by the British manufacturer STC and capable of speeds of up to 20,000 counts/second. It operates in a unidirectional, single-pulse mode, advancing the discharge by one position with each pulse and featuring ten stable positions. Unlike conventional decadic counting tubes (Dekatrons), its guiding electrodes are concealed behind a metal shell. Only the ten stable cathodes are visible through circular openings, each marked with its corresponding value on a transparent mica shield.

The Tesla 11TU7 is a neon-filled Nomotron counting tube capable of up to 20,000 counts/second. It operates in a unidirectional, single-pulse mode, advancing the discharge by one position with each pulse and featuring ten stable positions. Unlike conventional decadic counting tubes (Dekatrons), its guiding electrodes are concealed behind a metal shell. Only the ten stable cathodes are visible through circular openings, each marked with its corresponding value on a transparent mica shield.