Seiko Cal. 5240 - 728

The Seiko 5240-728 represents an important milestone in Seiko's 1982 lineup. It features a Silver dial protected by a Sapphire crystal and offers 120m of water resistance. [seikata-wm-e346155f72c7]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

120m

Dial Color

Silver

Jewels

23j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1982

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