Seiko Cal. 4470 - 831

The Seiko 4470-831 represents an important milestone in Seiko's 1980 lineup. It features a Black dial protected by a Sapphire crystal and offers 170m of water resistance. [seikata-wm-501c3339b555]

Also known as: Helmet, Crown

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

55 hours

Year

1980

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