Seiko Cal. 6684 - 436

This Spring Drive model from 1971 features a 42mm Hardlex-Coated Steel case. It features a Black dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-b2a7aeb65c37]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

13.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Black

Jewels

21j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1971

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