Seiko Cal. 6687 - 439

The Seiko 6687-439 represents an important milestone in Seiko's 1987 lineup. The Rotating bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-1be5ecf0a16b]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

35mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1987

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