Seiko Cal. 5617 - 641

Seiko 5617-641

The Seiko 5617-641 represents an important milestone in Seiko's 1970 lineup. Powered by the 5617 caliber with 27j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-60da1bfbc517]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Kinetic
Case Material
Titanium
Case Width
36mm
Case Thickness
8.5mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
Black
Jewels
27j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1970

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