I have confirmed the functionality. There were no particular problems. I re-checked with the lens and battery installed. I confirmed that the shutter speed and aperture change in response to the brightness (Av, Tv, P). I confirmed the bulb and slow shutter speeds up to 30 seconds. The self-timer function worked. The shutter curtain and mirror are moving in conjunction. The viewfinder is in good condition, but there is some dirt and mold on the viewing side. It's not noticeable when looking through the viewfinder with a lens attached. I confirmed that it works with a winder. The battery can be used with a dedicated 6V battery, or with four LR44 batteries and a spring or spacer. There is a sense of use. There are no particular problems, but I cannot guarantee the accuracy, so please refrain from purchasing if you are concerned. Shipping will be via Yu-Packet Plus.