Which Brownie model was Kodak's first internally synchronized flash camera?

Kodak’s first internally synchronized flash camera was the Six-20 Flash Brownie. Introduced in 1940, it combined the Brownie line’s simple box-camera design with a flash system timed to the shutter, allowing the flashbulb to fire at the proper moment for an exposure.

The model used General Electric flashbulbs and was built around the Six-20 format, which produced 6-by-9-centimeter photographs on 620 roll film. The “Six-20” name refers to the film size and spool system, not to the year of release or the number of exposures.

A common mix-up is the Brownie Starflash. That later model, released in 1957, is associated with Kodak’s first Brownie camera with a built-in flash. The Six-20 Flash Brownie came earlier, but its flash was an internally synchronized attachment rather than the same later integrated design. The Brownie line itself began in 1900 and helped make snapshot photography inexpensive and accessible.