Seiko Cal. 4438 - 638

The 4438-638 is a sought-after Solar piece from Seiko's golden era. It features a Green dial protected by a Mineral crystal and offers 100m of water resistance. [seikata-wm-b2dd0dc157b6]

Also known as: Bellmatic

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.7mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Green

Jewels

36j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1978

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