Seiko Cal. 0731 - 816

The Seiko 0731-816 represents an important milestone in Seiko's 1997 lineup. It features a Black dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-03bfeb5303e4]

Also known as: Helmet, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1997

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