Seiko Cal. 5646 - 997

The 5646-997 is a sought-after Hand-Winding piece from Seiko's golden era. With its 20mm lug width and 13.5mm profile, it sits comfortably on most wrists. [seikata-wm-64ab4fb1154b]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

13.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1979

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