Standard Procedures: Seiko vs. COSC
Standard Procedures: Seiko vs. COSC How does Seiko’s Grand Seiko Inspection Standard differ from the COSC tests required for a Swiss mechanical chronometer? In three… Read More »Standard Procedures: Seiko vs. COSC
Standard Procedures: Seiko vs. COSC How does Seiko’s Grand Seiko Inspection Standard differ from the COSC tests required for a Swiss mechanical chronometer? In three… Read More »Standard Procedures: Seiko vs. COSC