Seiko Cal. 6231 - 778

The 6231-778 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Green dial protected by a Hardlex crystal and offers 180m of water resistance. [seikata-wm-5cacf2c168be]

Also known as: Turtle, Sumo

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

24j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1967

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