Beats per hour: 21600.
36.6mm 21600bph Hand Winding Mechanical Manual Watch Movement For Seagull 6497 d
21600bph 17 Jewels 6497 Mechanical Hand Winding Vitage Mens Watch Movement b
17 Jewels Hand Winding 6497 Watch Mechanical Movement For Seagull ST36 6497 M
ST3600 6497 movement Mechanical hand winding movement fit for PARNIS watch M12
