Seiko Cal. 4421 - 551

The Seiko 4421-551 represents an important milestone in Seiko's 1975 lineup. It features a Green dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-bdc7bc21e4ff]

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1975

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