Seiko Cal. 5645 - 653

The Seiko 5645-653 represents an important milestone in Seiko's 1980 lineup. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-d3893103622f]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

12.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1980

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