PATENT OF PHOTO FLASH SYNCHRONISER 1939 Greeting Card

Text on the reverse side: In 1927, the first flash bulbs were produced by General Electric. The first bulbs were made of glass, but were eventually switched to plastic when realising the magnesium’s ignition of the flash could actually break the bulb. * A6 size (148mm x 105mm) * Luxury pearlescent eco-certified paper * Produced in our London studio * Trivia fact on the reverse * GS1 barcode for POS * Biodegradable cello bag (unwrapped option available)