Seiko Cal. 6687 - 717

The Seiko 6687-717 represents an important milestone in Seiko's 1975 lineup. Powered by the 6687 caliber with 19j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-6a14a65c8e40]

Also known as: World Timer, Navigator

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1975

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