Clue: Old vacuum tube
Old vacuum tube is a crossword puzzle clue that we have spotted 4 times. There are related clues (shown below).
Referring crossword puzzle answers
Likely related crossword puzzle clues
Recent usage in crossword puzzles:
- New York Times - Oct. 14, 2018
- Pat Sajak Code Letter - Jan. 19, 2014
- USA Today - April 30, 2012
- New York Times - Aug. 4, 2011
