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Meinecke, Gordon North and Central America Photography--Artificial light
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General Electric Photoflash bulb

3 individually packaged G.E. Mazda Photoflash lamps. The three light bulbs are numbered according to size: 11, 21, 31. The bulbs were for news, amateur, and professional photography. The cardboard packages contain exposure guide number charts and recommended examples re: film speed and shutter speed. Two bulbs are wire-filled and one is foil-filled. The foil lamp is stamped 1936 and one of the wire lamps gives a date range of 1928-46 for the patent on the design.

Canadian General Electric Company

Superflood Photolamp No.1

1 package containing a Superflood Photolamp No.1 manufactured by Wabash Photolamp Corporation, a subsidiary of Wabash Appliance Corporation. Superflood Photolamp is used for amateur motion pictures and timed exposures.

Wabash Appliance Corporation