Seiko Cal. 6689 - 437

This Automatic model from 1970 features a 40mm Hardlex-Coated Steel case. Powered by the 6689 caliber with 28j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-f31755119af8]

Also known as: Bellmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

28j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1970

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