Seiko Cal. 0778 - 820

Seiko 0778-820

Released in 1976, the Cal. 0778 with design code 820 was part of Seiko's domestic market collection. Powered by the 0778 caliber with 34j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-631eaa821ac7]

Also known as: Sumo, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
10.8mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
170m
Dial Color
White
Jewels
34j
Frequency
21,600 bph
Power Reserve
54 hours
Year
1976

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