The manufacturers part number of the clock is W33-7510-10L, and it has a dial of 1⅞" diameter. I bought it new, 20 to 30 years ago, from a surplus dealer in the 'States but have haven't run it until fairly recently - about 2 years. It has begun to stop, usually but not always, with the second hand between the 7 and 11 digits. A swift twist, rotating the clock around the axis of the hand centre, sets it going again. It will then run again for anything between one and several minutes. I have no training or specialist knowledge in these matters. I am, however, dexterous and practical. I wonder if there is anything realtively simple which I might do to cure the problem? Being retired, I would like to avoid the expense of taking it to a professional, but can't rule this out as I really want it to work properly.