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Thorn 45V telephone switchboard indicator lamp Here is a small wedge base lamp that was used for various purposes with varying voltages within the UK telephone system in the 1960s and 70s. This particular one is rated at 45V and was used in desk-top cordless switchboards such as [url=https://www.britishtelephones.com/gpo/pictures/pmbx2_2a%20_2.jpg][b]this one[/b][/url], a similar example of which I installed as a house telephone system when I was about 18..! Keywords: Lamps

Thorn 45V telephone switchboard indicator lamp


Here is a small wedge base lamp that was used for various purposes with varying voltages within the UK telephone system in the 1960s and 70s. This particular one is rated at 45V and was used in desk-top cordless switchboards such as this one, a similar example of which I installed as a house telephone system when I was about 18..!

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Lamp/Fixture Information
Manufacturer:Thorn
Model Reference:Lamp No. 2 Code 431854
Lamp
Lamp Type:Switchboard Indicator
Filament/Radiator Type:Tungsten filament
Base:Wedge based
Electrical
Voltage:45
Physical/Production
Fabrication Date:Unknown, possibly 1960s
Application/Use:Telephone indicator etc.
File information
Filename:DSC02544.JPG
Album name:Ria / Incandescent Lamps
Keywords:Lamps
Filesize:259 KiB
Date added:28 May 2026
Dimensions:2464 x 1386 pixels
Displayed:109 times
DateTime Original:2019:07:07 14:52:57
Exposure Time:1/40 sec
FNumber:f/2.8
File Source:Digital Still Camera
Flash:No Flash
Focal length:5.35 mm
ISO:160
Model:DSC-W120
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=1288
Favourites:Add to Favourites

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Sammi   [Fri 29 May 2026 at 12:26]
And are the type used in the test lamp.

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