Seiko Cal. 7131 - 727

Released in 1991, the Cal. 7131 with design code 727 was part of Seiko's domestic market collection. It features a Black dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-637c1a569bd2]

Also known as: Helmet, UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

200m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1991

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