Seiko Cal. 6231 - 735

This Hand-Winding model from 1978 features a 40mm PVD Black case. It features a Black dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-01b0e871184b]

Also known as: Navigator, Arnie

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1978

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