Not a question, but something I've learned that may be useful to others. After cleaning an Omega 1012 the amplitude was low and all over the place - fluctuating between 220 and 240 deg. I couldn't get it any higher.   The jewels, gear train, balance all look good.   It took me a long time to identify the problem - I wasn't checking the gear train with the sweep seconds pinion fitted. As soon as I fitted that, the problem was clear - too much tension on the friction spring (the s