Seiko Cal. 5231 - 138

The 5231-138 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5231 caliber with 33j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-ed932051dfa0]

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

9.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1976

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