Seiko Cal. 5275 - 637

The Seiko 5275-637 represents an important milestone in Seiko's 1970 lineup. It features a Silver dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-66b582cb762a]

Also known as: Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

43mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

160m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1970

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