Seiko Cal. 6311 - 439

The Seiko 6311-439 represents an important milestone in Seiko's 1973 lineup. It features a Black dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-91dee8cbedfb]

Also known as: Helmet, Crown

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

36mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1973

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