Seiko Cal. 6618 - 623

The Seiko 6618-623 represents an important milestone in Seiko's 1983 lineup. It features a White dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-dc9008c8ad2a]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1983

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