Seiko Cal. 6331 - 188

Released in 1972, the Cal. 6331 with design code 188 was part of Seiko's domestic market collection. Powered by the 6331 caliber with 25j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-2ca7620da3a9]

Also known as: Crown, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1972

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