Seiko Cal. 6389 - 550

The 6389-550 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6389 caliber with 24j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-b4740c3d400b]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1965

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