Seiko Cal. 3840 - 707

Seiko 3840-707

The Seiko 3840-707 represents an important milestone in Seiko's 1981 lineup. Powered by the 3840 caliber with 18j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-d0e3a64b558e]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
8.2mm
Lug Width
20mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
100m
Dial Color
Navy
Jewels
18j
Frequency
36,000 bph
Power Reserve
67 hours
Year
1981

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