The IIIC has a far better patch than the IIIc so yours must have been defective..
Originally Posted by msbarnes
Another fine Retina with the large view-rangefinder is the IIIS. It is a rigid front rangefinder that uses lens from 28mm - 135mm and unlike the IIc/C, IIIc/C does not require transferring focus distance to the wide or tele scale plus each lens will automatically change the brightline focal length scale in the viewfinder..
Below is my IIIS with 50mm f/2.8 lens.. I have a 50mm f/1.9 Retina-Xenon on the way...