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Robertson (GEC) 220V 50CP Carbon Filament Lamp An 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 ELMA code 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..? Keywords: Lamps

Robertson (GEC) 220V 50CP Carbon Filament Lamp


An 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 ELMA code 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..?

EWJona_10S50_red.jpg argon_iodine1.JPG 20190910_183726.jpg 20241109_123856.jpg 20241201_144652.jpg
Lamp/Fixture 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, clear
Service Life:Unknown
Electrical
Wattage:230 approx (50CP)
Voltage:220
Physical/Production
Factory Location:England (location unknown)
Fabrication Date:Not known at present (date code 11)
File information
Filename:20190910_183726.jpg
Album name:Ria / Incandescent Lamps
Keywords:Lamps
Filesize:274 KiB
Date added:Dec 06, 2024
Dimensions:2464 x 1386 pixels
Displayed:5 times
DateTime Original:2019:09:10 18:37:26
Exposure Time:1/17 sec
FNumber:f/2.4
Flash:No Flash
Focal length:3.3 mm
ISO:250
Model:SM-G800F
Software:G800FXXU1CRG3
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=606
Favorites:Add to Favorites

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Sammi   [Dec 07, 2024 at 06:51 PM]
1942 would have wartime restrictions about the packaging printed on it, so now we're down to two possibilities... Wonder

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