Seiko Cal. 6639 - 741

The Seiko 6639-741 represents an important milestone in Seiko's 1989 lineup. The Bidirectional bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-31ac07188ff0]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1989

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