Lrg Head Lamp
Homemade camera flash solution from Modern Mechanix, 1932 – “Synchronizing Photo Flash Lamp With a Camera Shutter. The difficulty of synchronizing the flare of a photo flash lamp with the click of the shutter is frequently encountered by enthusiasts of the camera art…The contrivance consists of a flat type pocket flashlight battery mounted between two pieces of wood, on the top of which is affixed a common porcelain socket to hold the photo flash lamp.”Link.