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Author Topic: I.D early Douglas rev counter/tachometer?  (Read 3817 times)

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Offline memaerobilia

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I.D early Douglas rev counter/tachometer?
« on: 21 Jul 2010 at 21:34 »
I am trying to find out which models and which year this Douglas 0-2400 rpm rev counter was used on. It would appear to be very early and pre-WWI. inner face (with curved oval opening at top) does not appear to have had glass. drive shaft turns. Face diameter is approx 8cm. ( 3.125 inches) Depth from front to back is approx 7 cm (less the small knob below center.



« Last Edit: 25 Jul 2010 at 23:07 by Dave »
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Offline Doug

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Re: I.D early Douglas rev counter/tachometer?
« Reply #1 on: 21 Jul 2010 at 23:38 »
It is from one of the WW1 era 2-3/4hp powered electrical generator sets. You also see them marked "Marconi Wireless Telegraph Company Ltd."

-Doug
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