A Gralab 300 from my darkroom, somehow the second hand went out of alignment as was zeroing out at 57 seconds. The fix didnt even require popping out the rivets, at the base of the hands are screws you can loosen and adjust. The minute hand is a simple flat head screw, and the second hand one is a allen head/ hex key. It is located inside the knob, there is a slot through the bottom of the plastic knob that allows you to put in a allen wrench. Just loosen adjust to zero, and re-tighten and your set.