Seiko Cal. 6257 - 641

This Hand-Winding model from 1977 features a 40mm Two-Tone case. It features a White dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-f4f141c0e3ef]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

14.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

28j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1977

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