Seiko Cal. 3815 - 423

Seiko 3815-423

The Seiko 3815-423 represents an important milestone in Seiko's 1977 lineup. Powered by the 3815 caliber with 35j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-ec46ce3bb485]

Also known as: Sumo, Golden Tuna

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
41mm
Case Thickness
10.2mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
Blue Sunburst
Jewels
35j
Frequency
21,600 bph
Power Reserve
68 hours
Year
1977

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