"Original Gundelach" gas x-ray tube with tungsten

Made:
1919-1929 in Gehlberg
Original Gundelach' gas x-ray tube with tungsten target, by Emil Gundelach, Gehlberg, Germany, supplied by F.K. Butt,

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Original Gundelach' gas x-ray tube with tungsten target, by Emil Gundelach, Gehlberg, Germany, supplied by F.K. Butt,
Science Museum Group
© The Board of Trustees of the Science Museum

"Original Gundelach" gas x-ray tube with tungsten target, by Emil Gundelach, Gehlberg, Germany, supplied by F.K. Butt, 1919-1929