Seiko Cal. 6638 - 613

The Seiko 6638-613 represents an important milestone in Seiko's 1982 lineup. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-69ac3fa0af2a]

Also known as: Turtle, Rally

Specifications

Movement

Solar

Case Material

Titanium

Case Width

44mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1982

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