Seiko Cal. 5638 - 148

The Seiko 5638-148 represents an important milestone in Seiko's 1966 lineup. Powered by the 5638 caliber with 17j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-995dd2f2bdaa]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1966

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