Seiko Cal. 6221 - 154

This Spring Drive model from 1975 features a 36mm PVD Black case. It features a White dial protected by a Hardlex crystal and offers 100m of water resistance. [seikata-wm-6aa5ef52610e]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

15.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1975

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