Seiko Cal. 3881 - 648

The 3881-648 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3881 caliber with 31j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-6ea430eca2d7]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

10.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

White

Jewels

31j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1986

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