Seiko Cal. 6390 - 725

The Seiko 6390-725 represents an important milestone in Seiko's 1972 lineup. Powered by the 6390 caliber with 27j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-29eff2fc0fdf]

Also known as: Monster, Rally

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Silver

Jewels

27j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1972

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