Co-Axial Regulating (Square); dynagem

dynagem - Non Swiss;For adjusting the balance wheel of Omega movements for co-axial calibres listed below that require a square timiny key.;Square timing key for all co-axial Omega movements;For all co axial movements including calibres: 2300A; 2500A; 2500B; 2500C; 2610A; 2627A; 2628B; 3301A; 3303A; 3313B; 3603A; 3890A and similar