This Jeco wall clock with a tuning fork movement is badged Smiths.  The pictures show the components of the movement and the gear layout during disassembly and cleaning. The first video shows the smiths clock dial going backwards – illustrating the bidirectional ability of the Tuning fork movement. The second video shows the gears in motion starting with the perforated drive disc spinning at a high rate and then the next 2 gears can be seen in motion at progressively slower rates.  

Courtesy Brian Scott