Seiko Cal. 5240 - 639

Released in 1975, the Cal. 5240 with design code 639 was part of Seiko's domestic market collection. It features a Green dial protected by a Hardlex crystal and offers 160m of water resistance. [seikata-wm-99110f274f3c]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

46mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1975

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