Seiko Cal. 3821 - 257

The 3821-257 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3821 caliber with 25j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-d02afe5dfbd7]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

8.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

25j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1973

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