Tonight I was lucky enough to get my hands on a 1940/41 Leica IIIC with a 5cm Summitar f2! It turns out it is a red shutter curtain model. I'm very new to the Leica world--I have heard about the red curtain but don't know too much about it. Is there a reason one curtain is red and one is black? The camera is very clean and original. It was brought back from a G.I. stationed in Germany, I bought it from his niece who found it in a box of his things after he passed away. I know IIICs are pretty common, but I seem to remember that the red curtain is somewhat rare or something. Anyway, any info would be appreciated. I'll be hunting around online in the mean time!