Seiko Cal. 6390 - 561

The Seiko 6390-561 represents an important milestone in Seiko's 1975 lineup. It features a Cream dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-2c4a7982e753]

Also known as: Bullhead, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

9.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Cream

Jewels

21j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1975

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