Concept II Model A Indoor Rowing Machine Serial No.: 85-55, the 55th run of 1985. Main Characteristics Handle: Wood with black grips Flywheel: Bicycle wheel with black flaps in the spokes Footboards: Wood Add-on Monitor (Manufacture Dates 1981–1986 No longer in production Serial Number Information All Model A Rowing Ergometers manufactured after October 1, 1982 have a serial number located on the bottom edge of the chain guide mount board: On Nov. 4, 1985, we started using the date of production as the serial number. Between Oct. 1, 1982 and Nov. 4, 1985, we used a four digit numbering system. The first two numbers indicate the year in which the machine was made, and the rest of the serial number identifies the run number. Thus, a serial number of 83–12 identifies the Model A as the twelfth run of 1983. If your Model A was made before Oct. 1, 1982, it will not have a serial number. Please identify these machines by writing the purchase date whenever the serial number is needed.) I do not deliver