Seiko Cal. 5684 - 523

This Spring Drive model from 1976 features a 40mm Hardlex-Coated Steel case. Powered by the 5684 caliber with 18j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-bc9fc6f3056e]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

12.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1976

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