Seiko Cal. 6646 - 346

This Spring Drive model from 1965 features a 38mm Titanium case. It features a Burgundy dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-5f23b3b1919b]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

36j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1965

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