Seiko Cal. 5613 - 840

The Seiko 5613-840 represents an important milestone in Seiko's 1981 lineup. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-c4d4371af0a6]

Also known as: Tuna, Rally

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

12.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Champagne

Jewels

26j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1981

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