Seiko Cal. 5645 - 427

The 5645-427 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5645 caliber with 19j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-58da6e8d557b]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

White

Jewels

19j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1994

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