Seiko Cal. 6131 - 490

The 6131-490 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6131 caliber with 23j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-df13a07d1df4]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

35mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

White

Jewels

23j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1966

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