Seiko Cal. 5646 - 630

Released in 1988, the Cal. 5646 with design code 630 was part of Seiko's domestic market collection. The Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-dd3dc459ba07]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.6mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1988

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