Seiko Cal. 5257 - 277

The 5257-277 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5257 caliber with 31j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-b637524e3347]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

11.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1983

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