Seiko Cal. 6638 - 326

The 6638-326 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 26j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-4274b7839319]

Also known as: Monster

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1978

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