The Contaflex cameras equipped with Pantar lenses could use the 30/4 Pantar and 75/4 Pantar front lens cells. The were provided in plastic bubbles. They could also use the Steritar D (814 or catalog 20.2006). These also fit the Contina III.
The 35/4 and 75/4 Pantar lenses.
The Steritar D mounted on a Prima.
A look at the mount on the rear of the lens.