research
 Patents
 Books
 Literature
 Articles
 Timeline
 Auction Archive

about
 About this site
 Wanted to buy

bulb gallery

Incandescent:
C
carbon
WD
drawn tungsten
WC
coiled tungsten
WM
mini tungsten
WS
pressed tung.
FG
figural bulbs
XL
christmas
XS
christmas sets
T
tantalum

Discharge:
NE
neon lamps
AR
argon lamps
XE
xenon lamps
MA
mercury
MC
fluorescent
MS
special mercury

Hardware:
F
fuses
FX
fixtures
PF
plugs & fittings
SA
sockets
SW
switches

tube gallery

 X-ray
 Geissler
 Crookes
 Radio
 Box art

museum pics

 Dr. Hugh Hicks
 
Fort Myers, FL.
 S.Slabyhoudek

links

 Related links
 Submit a link

 

Author Topic: Edison Mazda, National Mazda & GE Mazda markings  (Read 5377 times)

Offline James

  • Hero Member
  • ****
  • Posts: 169
    • www.lamptech.co.uk
Edison Mazda, National Mazda & GE Mazda markings
« on: July 28, 2019, 02:10:11 pm »
Recently I came across an example of an early inside frosted lamp with the Edison Mazda brand, and since the internal date markings are not visible I would like to try to determine its date of manufacture.  Since it is inside frosted, it must be later than 1925 when that type of lamp was first introduced.  I thought that it may be possible to identify the last possible date by knowing when GE stopped using the Edison Mazda brand, but realise that I don't actually know when that happened - perhaps some other members may have details about this?
nn
Surprisingly there is rather a lot of information in old lighting books and journals about GE's takeover of National Mazda and the requirement to re-name that as the National Lamp Works of GE, but I have also not been able to find a precise date of when National Mazda was dropped and replaced by GE Mazda.

By looking at old advertisements, I have not found any National Mazda references after 1931, but Edison Mazda appears to have been in use as late as 1935.  Meanwhile there are GE-Mazda branded advertisements appearing from 1930 onwards.

If anyone might be able to more precisely identify these dates, it may be of great assistance to help us identify the likely production dates of older lamps.