John Koehrer: the needle is NOT sticky, even at either end: it moves freely.
HTF III: everything is immaculate: no corrosion. And the needle does NOT ever move without batteries in the K1000.
AgX: the movement of the needle in the K1000 is determined by three factors: ISO, aperture selection (via the tiny lever inside the mount), shutter speed selection. You have to remember that at some shutter speeds (depending upon ISO) the meter ceases to operates because the EV (for a particular film speed) is too low. Thus this 'sudden' movement is built-into the mechanism. It's just that we do not have the accompanying light reading to go along with that determinant in my particular case. - David Lyga