Seiko Cal. 6390 - 256

The 6390-256 is a sought-after Solar piece from Seiko's golden era. Powered by the 6390 caliber with 34j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-7ea59743066b]

Also known as: Navigator

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

White

Jewels

34j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1975

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