I recently repaired a 1981 Hermle 340-020 Westminster chiming clock. I tend to dread these things but this one had obviously been serviced regularly. The oil was good and any problem holes had been bushed. The wheels were marked W S & C to indicate which train they came from. The timekeeping barrel had been bushed. The mainspring grease, more like glue, showed that the springs had not been removed for a long time. So far so good, no problems here. The clue as to why it was not running well was the state of the screws holding the floating balance to the back plate, heads rather chewed. The lever had marks from pliers all over it. Floating balances have been around a long time but many people still have no detailed knowledge of how they are supposed to work. In this one the guard pin was just touching the outside of the safety ring and limiting the swing of the balance. The balance itself was fine; after setting it on the banch and giving it 3/4 of a turn it took 8 minutes to stop. After cleaning and adjusting the movement the balance settled with rotation of about 1 1/4 turns with the movement fully wound; my BHI course notes say that it should be 1 1/2 turns when fully wound and not fall below 1 turn after eight days so 1 1/4 turns on a forty year old movement is not too bad.
Most visitors online was 1660 , on 12 Dec 2020