Hello I am new to this forum. My wife and I recently purchased a Wilhelm Tribbensee large cabinet clock at an estate auction. I have always wanted one of these. I think the clock is a early 1980's production? I have a local service tech scheduled to service the clock next week. I seems to keep pretty accurate time. The chimes are somewhat slow at the quarter hours. I looked inside the clock when it was chiming and the governor flap or butterfly will turn at a good speed but at each event it slows to a crawl then goes at good speed till the next event then it slows down again. The hands are off at each event too. I have read a lot so far and realize the clock need some service. The instruction manual and some other promotional paper were in the bottom of the cabinet. Also in the bottom of the cabinet was the device to wind the clock and two threaded pins with knobs on the end. they are about 3 inches long with fine threads and a knob on the end. In my reading different articles and watching several videos I have never seen the knobs mentioned. I have attached pictures. Can anyone advise me what these items are for?