Seiko Cal. 5254 - 638

The 5254-638 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5254 caliber with 25j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-a5025c1b3446]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

25j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1981

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