This particular model of the Class M appears to have been a meticulously-made copy of the Edison product, and intended to be an exhibition machine. Whoever made it incorporated “improvements” to the original Edison product. The hand-made/machined governor features brushes made of multiple thin brass sheets soldered together and shaped. Because of this, unlike the Edison product, this governor is not subject to damage if rotated backwards. The craftsman who made this remarkable machine also engineered more lateral and vertical travel into its reproducer than was typical of the Edison “Automatic” Reproducer.
The top casting carries a typical lug for a serial number, but no number was ever stamped into it. Like the Edison product, there are bosses cast into the front of the upper casting where adjusting screws for the straight edge are typically located. This machine has no adjusting screws, and the bosses are not threaded for any. The beautifully made brass mandrel is fashioned from two machined discs with the cylindrical sheet brass body secured to the discs with a countersunk flat-head set screw. The left stanchion of the upper casting was milled to accommodate a mandrel shaft of original length. This suggests that the castings were cast from original Edison parts and through this process are slightly smaller than the Edison product. The main pulley, motor pulley, and reproducer are gold plated. The carriage tube, switch arm, and governor are lacquered brass. There are holes in the lower casting for a listening-tube gallery, which explains the efforts taken to enhance the machine’s appearance.
The carriage eyelet is (like the main castings) slightly smaller than the Edison product, so the specially-made reproducer will fit only this carriage. Interestingly, the adjusting screw does not reach the arm on the reproducer.
The decorations on this machine are as beautiful as its craftsmanship. Unlike the Edison product, even the carriage arm is decorated, as would befit a machine intended for exhibition.