Baby Rolleiflex (1957)
The Automatic Rolleiflex 4x4, popularly known as the "gray baby" Rolleiflex, was introduced in 1957, at an announced list price of USD $133.65.[1] It was a knob-advance twin-lens reflex yielding 12 exposures of 4x4cm on 127 film.
This model helped kick-start a brief boom for 38mm x 38mm "super slides" (whose slide mounts were the same external dimensions as 35mm slides, but offering a larger image area), and inspired several Japanese lookalikes such as the Yashica 44.
By 1959 the gray baby's advertised list price had dropped to USD $99.50, [2] perhaps a reflection of waning interest in the format.
Notes
<a href="http://www.flickr.com/photos/16822508@N05/2184015618/" title="Grey Baby Rollei by skagman, on Flickr"><img src="" width="375" height="500" alt="Grey Baby Rollei" /></a>