Seiko Cal. 6181 - 639

Seiko 6181-639

The 6181-639 is a sought-after Solar piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-d19c73a5cf2e]

Also known as: Monster, Tuna

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
10.1mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
50m
Dial Color
Green
Jewels
22j
Frequency
21,600 bph
Power Reserve
63 hours
Year
1987

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