Seiko Cal. 6687 - 720

The Seiko 6687-720 represents an important milestone in Seiko's 1966 lineup. It features a Green dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-1f4187dfa0f9]

Also known as: Pogue

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

15.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Green

Jewels

33j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1966

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