My clock needed repair for going unusually fast (gaining 2-3- hours a week). The owner of Mark's Time said he would make repairs for [about] $225, to be picked up in a couple of weeks. I did so. There was no apparent difference in the clock and I returned it with that comment and the proprietor said he would have it fixed. On the next pickup I found no noticeable difference in the performance of the clock and returned it with the same comment. The proprietor said he would have it fixed. When I next picked up the clock, he set the time of day on it (it was running at the time) and told me it kept perfect time. In the next twenty-four hours it gained three-quarters of an hour.