Seiko Cal. 5242 - 640

The 5242-640 is a sought-after Spring Drive piece from Seiko's golden era. With its 19mm lug width and 9.0mm profile, it sits comfortably on most wrists. [seikata-wm-c4f5ce97504e]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

32j

Frequency

28,800 bph

Power Reserve

62 hours

Year

1969

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