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◊× Category AM -A-shape Miscellaneous
◊× Works?Yes
◊× Old?Yes
◊× TechnologyIncandescent
◊× Voltage120 V
◊× Power15 W
◊× Filament Mat.Tungsten
◊× Filament Shp.R3
◊× Gas FillingVacuum
◊× Flasher?No
◊× Tip?No
◊× Bulb ShapeA55
◊× Diameter53 mm
◊× Length105 mm
◊× BaseE12 with skirt
◊× Original Sleeve?No
◊× Color(none)
◊× TransparencyClear
◊× Outside?No
◊× Reflector?No
◊× ApplicationWarning board North Sidney Telephone exchange
◊× ManufacturerGE Mazda
◊× CountryUSA
◊× Date made1930-1935
◊× Date acquired7/30/2005
◊× Purchase priceAU 4.00
◊× Number of Spares1
◊× LocationLU 2
◊× Needs attention:Photos
◊× Labelled?Yes
◊× How acquired:Ebay, doglite. Fin Stewart, Australia
Comments:First bulb from Fin Stewart. He says: Several dozen of them were used on a warning board in the North Sydney telephone exchange from about 1930/35. They replaced older round bulbs with tips as these burnt out. The whole board must have had over 500 bulbs on it, each one connected to a downtown office. If there was a problem with a phone line, the bulbs would light. This system was shut down about 1980. I have never seen this style anywhere else.

Last updated: November 11, 2009, 1:30 pm