Seiko Cal. 5640 - 341

The 5640-341 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 13.3mm profile, it sits comfortably on most wrists. [seikata-wm-cb892ef62700]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Green

Jewels

17j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1971

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