I have acquired a very large (19" by 19" by 4.5") commercial wood case wall clock with the Hammond Bichronous white round faceplate; but it has a Telechron motor made by GE and is self-starting. A brass pull comes out of the bottom of the cabinet, which pulls down to set the time. The telechron motor is model: 1H1 312. The clock works perfectly. Everything appears to be original including the motor. I'm having trouble dating the clock; also confused about the Hammond - GE - Bichronous - Telechron labels. Any help you could give me on understanding this clock would be greatly appreciated. I don't have the technical skills to take pictures and the put them on this site (age 69). I have seen this large wood cabinet on several other clocks on the internet. Plan to keep it but would love to know the general time period of manufacture.