Seiko Cal. 3818 - 639

Seiko 3818-639

Released in 1977, the Cal. 3818 with design code 639 was part of Seiko's domestic market collection. Powered by the 3818 caliber with 34j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-0e83cdd41ff0]

Also known as: Tuna, Arnie

Specifications

Movement
Quartz
Case Material
Gold-Plated
Case Width
42mm
Case Thickness
12.9mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Blue Sunburst
Jewels
34j
Frequency
36,000 bph
Power Reserve
54 hours
Year
1977

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