Seiko Cal. 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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