Seiko Cal. 6331 - 169

The Seiko 6331-169 represents an important milestone in Seiko's 1980 lineup. Powered by the 6331 caliber with 33j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-d915669fb2de]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

12.4mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

33j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1980

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