Seiko Cal. 6331 - 334

The 6331-334 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6331 caliber with 18j jewels beating at 21,600 bph, it delivers a 59 hours power reserve. [seikata-wm-a525f955bcc8]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Black

Jewels

18j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1976

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