Seiko Cal. 3878 - 641

Seiko 3878-641

The Seiko 3878-641 represents an important milestone in Seiko's 1968 lineup. Powered by the 3878 caliber with 34j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-f9f6f8b4f19b]

Also known as: Shogun, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
43mm
Case Thickness
14.3mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
180m
Dial Color
Blue Sunburst
Jewels
34j
Frequency
36,000 bph
Power Reserve
72 hours
Year
1968

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