Seiko Cal. 6687 - 528

The Seiko 6687-528 represents an important milestone in Seiko's 1971 lineup. Powered by the 6687 caliber with 28j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-59d1c9d289a4]

Also known as: Emperor

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

15.4mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

120m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1971

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