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Robertson 220V 50CP Carbon Filament Lamp

Robertson 220V 50CP Carbon Filament Lamp

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A recent eBay find. It consumes around 230W at its rated voltage of 220V. I am not 100% sure of the date of production, so I hope someone can help. The etch is very worn but I can see that the date code is 11 and I believe it uses the Osram system which according to the online calculator I used gives one of four possibilities - Nov 1934, 1942, 1950 or 1958. I doubt it is 1934 as the construction looks too recent for that, but hopefully the wrapper design might give a clue..?

DSC02595.JPG DSC02594.JPG 20190910_183726.jpg DSC02322.JPG

Light Information

Light Information

Manufacturer:Robertson Electric Lamps
Model Reference:AP 2117
Lamp
Lamp Type:Incandescent
Filament/Radiator Type:Carbon filament
Base:B22d (BC)
Shape/Finish:Pear shaped
Service Life:Unknown
Electrical
Wattage:230 approx (50CP)
Voltage:220
Physical/Production
Factory Location:England
Fabrication Date:Unknown

File information

File information

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Filename:20190910_183726.jpg
Album name:sox35 / Incandescent Lamps
Keywords:Lamps
File Size:274 KB
Date added:Sep 11, 2019
Dimensions:2464 x 1386 pixels
Displayed:23 times
Date Time:2019:09:10 18:37:26
DateTime Original:2019:09:10 18:37:26
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FNumber:f 2.4
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Focal length:3.3 mm
ISO:250
Make:samsung
Model:SM-G800F
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