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McGraw Edison Unidor 250
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A mercury Vapour McGraw Edison Unidor 250 from 1975,these came supplied with Holophane 4222 glass refractors at that time. My HPS Unidor 150 from 1980 came with a plastic refractor.
Manufacture date: Circa 1975
Manufactured in: Scarborough,Ont.Canada
Voltage: 120/240V 2.50A/1.25A
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can you light it up?
A lit up pic is coming right up! Here