Seiko Cal. 4438 - 860

The 4438-860 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4438 caliber with 28j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-0b22086e5f16]

Also known as: Tuna, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

9.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1987

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