Seiko Cal. 5231 - 256

Released in 1979, the Cal. 5231 with design code 256 was part of Seiko's domestic market collection. Powered by the 5231 caliber with 28j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-772496ee220a]

Also known as: Arnie

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1979

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