Seiko Cal. 5634 - 257

The Seiko 5634-257 represents an important milestone in Seiko's 1978 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-acc87ef6ea4d]

Specifications

Movement

Solar

Case Material

Titanium

Case Width

42mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1978

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