Seiko Cal. 6635 - 310

The Seiko 6635-310 represents an important milestone in Seiko's 1992 lineup. It features a Black dial protected by a Mineral crystal and offers 60m of water resistance. [seikata-wm-aaed47ed113c]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1992

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