Seiko Cal. 7131 - 318

The 7131-318 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-4687ca388825]

Also known as: Samurai, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

37mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Burgundy

Jewels

25j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1974

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