[lxdude]

BTW you don' have to switch it back to A to reset it.. just cock the body n it will reset the shutter. Put a lens cap over the lens when your time is up so the reset will not effect the image.
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No, it will not reset the shutter. The shutter will remain open until the switch is set back to A, no matter what else is done. The camera will reset everything else- light baffle, mirror and diaphragm. If a lens cap is put over the lens it will keep out light while the camera is being wound, but effectively the shutter will be: the light baffle behind the mirror to open, and the lens cap to close.