Seiko Cal. 4537 - 688

The Seiko 4537-688 represents an important milestone in Seiko's 1979 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-38626a9dbb71]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1979

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