1960's-80's model 528-6. Serial # 196807. Features a round clock face and a lid that lifts entirely off for accessing inner workings. Tested, works. One corner of the top pane of glass is cracked. The left pin on the lid doesn't fully thread through its fastener but does not come undone. There are some scratches evident in the plating. Unit measures approximately 8 1/2" wide, 9 1/2" high and 6 1/2" deep. Heavy shipping item. Please inquire regarding shipping rates prior to bidding. Keywords: perpetual motion, timepiece, mantel, Swiss