Seiko Cal. 6687 - 366

This Quartz model from 1968 features a 39mm Titanium case. Powered by the 6687 caliber with 23j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-4c498dc659b6]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Burgundy

Jewels

23j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1968

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