Seiko Cal. 6687 - 821

The Seiko 6687-821 represents an important milestone in Seiko's 1985 lineup. Powered by the 6687 caliber with 30j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-b86beb9c434e]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

30j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1985

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