Seiko Cal. 6389 - 391

The 6389-391 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6389 caliber with 28j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-e3187ed387b6]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

14.9mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

28j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1978

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