Seiko Cal. 3881 - 391

Seiko 3881-391

The Seiko 3881-391 represents an important milestone in Seiko's 1991 lineup. Powered by the 3881 caliber with 17j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-08cbc74af366]

Also known as: Helmet, Baby Tuna

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
39mm
Case Thickness
9.2mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
90m
Dial Color
Green
Jewels
17j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1991

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