Retina IIIc Type 021 Ausf.II produced from July-December 1957.
This later version of the IIIc (Small 'c') carries the same single-range meter as the Retina IIIC (Capital 'C').
This example has a Synchro-Compur shutter & Retina-Xenon C f2/50mm lens.
Also shown is an interchangeable Retina-Curtar-Xenon C f5.6/35mm front element - this lens is compatible with the IIIc, IIc, IIIC & Retina Reflex Type 025.