Seiko Cal. 5638 - 528

The 5638-528 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5638 caliber with 24j jewels beating at 28,800 bph, it delivers a 58 hours power reserve. [seikata-wm-34a7e897e418]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

41mm

Case Thickness

15.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1997

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