Seiko VK63A

The VK63A is a hybrid meca-quartz chronograph movement with 3-6-9 tri-compax layout. Features quartz timekeeping with mechanical chronograph module for smooth sweeping chrono hand. 60-minute counter at 9, small seconds at 6, 24-hour at 3, date at 4:30. Battery life approximately 3 years. Accuracy +/- 20 seconds per month.