Seiko Cal. 5240 - 813

Released in 1970, the Cal. 5240 with design code 813 was part of Seiko's domestic market collection. With its 22mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-788fd3ecc8ab]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Green

Jewels

32j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1970

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