Seiko Cal. 5240 - 231

The Seiko 5240-231 represents an important milestone in Seiko's 1985 lineup. It features a Black dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-a84723258d46]

Also known as: Helmet, Flighty

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1985

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