Seiko Cal. 6687 - 665

The Seiko 6687-665 represents an important milestone in Seiko's 1976 lineup. Powered by the 6687 caliber with 20j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-88b33a0b90ea]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

15.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1976

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