Eisco-Ticker-Tape-Timer-Eisco-PH0353A-P-This-ticker-tape-timer-from-Eisco-is-housed-in-a-tough-moulded-plastic-case-The-timer-operates-on-12V-AC-supply-&-produces-50-60-dots-per-second-depending-on-the-mains-supply-frequency-P-The-case-has-a-tape-guide-&-a-carbon-disc-plug-which-can-be-moved-to-maximise-the-use-of-the-discs-P-Eisco-Ticker-Tape-Timer-with-Tape-Guide-&-Carbon-Disc