Seiko Cal. 6638 - 554

The Seiko 6638-554 represents an important milestone in Seiko's 1969 lineup. Powered by the 6638 caliber with 25j jewels beating at 21,600 bph, it delivers a 51 hours power reserve. [seikata-wm-cd18d6882884]

Also known as: Sea Horse

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.6mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1969

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