Seiko Cal. 5640 - 497

The 5640-497 is a sought-after Hand-Winding piece from Seiko's golden era. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-0921f8a0abb6]

Also known as: Goldfeather, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1989

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