I've taken a cuckoo clock in - single bird with two animated gentlemen hoisting beer mugs - which obviously needs a thorough cleaning. The only markings on the straight bar back plate are "Germany" and "140". Searching the Kochmann index of plates, I find that this is an AMS movement (top of Page 328) and I am unfamiliar with AMS as a manufacturer. Can anyone shed any light on this? Possible range of years in business, etc? Will get a photo up soon...... Thanks in advance.