Seiko Cal. 5617 - 520

The Seiko 5617-520 represents an important milestone in Seiko's 1970 lineup. It features a Navy dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-f5b2eda22f34]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1970

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