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Author Topic: 4v 0.75a osram small edison screw bulbs  (Read 622 times)

Offline Marks n Sparks

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4v 0.75a osram small edison screw bulbs
« on: February 21, 2018, 12:58:01 pm »
I have a couple of these bulbs and cannot find what they would have been used for. At 4v i would expect them to have be used with an old 2 cell accumulator like a miners or railway lamp but why such a large thread? They have a small slightly mushroomed envelope, about the size of the small car/motorcycle indicator but mushroomed. I haven't been able to identify there use by searching the internet, apart from curiosity it would seem a shame to bin them if some one some where could use them. Anybody any ideas?