The Brownie Ball Bearing shutter works not only for time and bulb exposures, but has variable indicated speeds of 1/25, 1/50 and 1/100 second. It is fitted with iris diaphragm and supplied with the Nos. 3 and 3A Folding Brownie cameras.
For a more complete description of the Kodak Autotime Scale supplied with this shutter, see page [8].
Compound Shutter
The Compound shutter is an automatic and setting shutter combined. Automatically, either time or bulb exposures may be made, while it may be set for speeds of from 1 to 1/150, 1/200 and 1/250 second, according to size of shutter. The shutter leaves are formed of segments opening in star shape, giving even illumination over the entire plate the instant the exposure is started, and an iris diaphragm is supplied for stopping down.
Case is made of aluminum, and accurate adjustments can be made with the shutter in any position.
Regularly supplied on the Nos. 1A, 3, 3A Special and Six-Three Kodaks and as a special equipment with the Nos. 4 and 4A Folding Kodaks.