MK-3131
Number on Case Back: 111309, MK-3131
Mass, movement + case + band: 147.5g
Dimensions, case: 38mm diameter x 13.58mm thick
Crystal diameter: 32.0mm
Band length:
Case-to-band lug size:
Band pin type / diameter / length:
MK-5055
Similar to above MK-3131
Number on Case Back:
Crystal diameter: 32.0mm
Band length:
Case-to-band lug size:
Band pin type / diameter / length: