I own and enjoy an Atmos 528-8. Purchased last December not working even when wound also had flat bellows After much reading and study here I rebuilt it including having the bellows refilled. It now runs perfectly and is accurate to about 10 seconds per month. I wish to observe rotation of the first wheel to know how long one rotation takes. This to satisfy my curiosity and to better watch the winding process. Anyone done a tooth count? Would also like to obtain (purchase) one dial screw (damn thing fell on the rug during assembly) if anyone has one to spare. D. Hunter