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Unusual GE A-Line

Unusual GE A-Line

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I came across this photo online, and was intrigued that the etch has the letters "M" and "D". Normally GE A-line lamps are marked "W" if made at Winchester, "S" if made at St.Louis, and "Z" if made at Oakville. I have never seen one before with "M" and "D" like this. Do any of the USA incandescent experts here know what this means? I suppose they were made at another factory, perhaps Mattoon?

MD2040A19.jpg IN_P_GE-Mazda_1000PS52DB-120V.jpg TH_DE_GE_Q500T3CL.jpg IN WC D GE 105-200PS30DAY-E26.jpg

Light Information

Light Information

Manufacturer:GE
Lamp
Lamp Type:A-Line
Base:E26
Shape/Finish:A19 diffuse
Service Life:1000 h
Electrical
Wattage:40W
Voltage:120V
Optical
Lumen Output:505 lm
Physical/Production
Factory Location:USA
Fabrication Date:1980s?

File information

File information

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Filename:MD2040A19.jpg
Album name:James / Incandescent
Keywords:Lamps
File Size:150 KB
Date added:Apr 22, 2020
Dimensions:703 x 490 pixels
Displayed:75 times
Date Time:2020:04:22 22:07:29
DateTime Original:2020:04:22 22:01:37
Software:Windows Photo Editor 10.0.10011.16384
URL:https://www.lighting-gallery.net/gallery/displayimage.php?pos=-176913
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CEB1993
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Camden


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Apr 22, 2020 at 02:31 PM Author: CEB1993
These are Standard/Basic GE light bulbs. They are made with a thinner silica coating to maximize light output. Personally, these are some of my favorite types of light bulbs because I can see the filament glowing through the silica.

Philips DuraMax and GE Miser forever!  Classic incandescents are the best incandescents!

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Westinghouse Lifeguard H38JA-100-DX BT-25!


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Apr 22, 2020 at 08:40 PM Author: HPS_250
I saw those on eBay recently. I thought about getting a pack but settled on a 1980 Westinghouse Lifeguard BT-25 that I had found.

I like all kinds of lighting and electrical, especially HIDs and street lights!
-  neon sign collector
- vintage and rare lamp collector
Power company: SCE (Southern California Edison) 120V, 60HZ
Westinghouse Lifeguard will always be my favorite lamp
Gotta love vintage HIDs!
Stop LEDISEASE!

Silverliner
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Rare white reflector


GoL
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Apr 23, 2020 at 10:00 PM Author: Silverliner
James, these letters drives me nuts as well. 1980s GE lamps are so confusing!

Administrator of Lighting-Gallery.net. Need help? PM me.

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James
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Apr 23, 2020 at 11:51 PM Author: James
Hi Dave, I was hoping you of all people would have the answer! Yesterday I saw another GE lamp of similar era simply marked “L”, and a T6.5 tubular with “B”. The latter was maybe Bellevue, since that made all the tubular projectors. But L and M do not seem to correlate with the names of other A-Line factories. I am going to start studying the photos of as many etches as I can find for GE A-Line lamps like this, perhaps with your help we could try and narrow down if there is some pattern and finally crack this one
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