Seiko Cal. 3881 - 648

Seiko 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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