Seiko Cal. 5623 - 311

This Spring Drive model from 1975 features a 40mm Hardlex-Coated Steel case. Powered by the 5623 caliber with 28j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-db614d7af37e]

Also known as: Bellmatic, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Burgundy

Jewels

28j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1975

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