Seiko Cal. 6687 - 607

This Spring Drive model from 1978 features a 45mm Titanium case. Powered by the 6687 caliber with 20j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-144ec86ad544]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1978

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