Seiko Cal. 6278 - 831

Seiko 6278-831

The 6278-831 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6278 caliber with 18j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-09a3003448fc]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
43mm
Case Thickness
9.0mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
140m
Dial Color
Burgundy
Jewels
18j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1983

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seikata-wm-09a3003448fc