Seiko Cal. 0770 - 378

Seiko 0770-378

The Seiko 0770-378 represents an important milestone in Seiko's 1986 lineup. Powered by the 0770 caliber with 17j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-e23bb6340fc4]

Also known as: Tuna, Sea Horse

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
12.7mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
150m
Dial Color
Navy
Jewels
17j
Frequency
28,800 bph
Power Reserve
52 hours
Year
1986

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