I have a 1930s C2, and a C3 from 1963. I've searched vainly for a 1966 C3, but as of yet I've never come across one with a serial number that indicates a year of manufacture later than 1964. That final '66 run, if it did in fact happen, must've been very short. I haven't used either camera in years. I have two problems with it: The tiny viewfinder, and the lack of strap lugs. The everyready case is surprisingly compact (compared to some cases out there) but still a bother to leave on the camera. The Cintars are pretty variable in quality. I've had one that was very sharp, and I had one that was so soft in the corners, I have to wonder if they accidentally put one of the elements in backwards at the factory. The shutter in the C3 is a mechanical disaster, a Rube Goldberg contraption, which though it can not be killed by abuse, never worked accurately to begin with. I've read that Argus were well aware that the 1/300 top speed advertised on the dial was a complete fantasy, but for some reason they never renumbered it for a more honest 1/200. Still it's a Classic, and everybody owes it to themselves to run at least one roll through a C3 just for the experience.