Seiko Cal. 5645 - 427

Seiko 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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