Seiko Cal. 6656 - 139

Seiko 6656-139

The Seiko 6656-139 represents an important milestone in Seiko's 1972 lineup. Powered by the 6656 caliber with 31j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-0b120399c1a3]

Also known as: Rally, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
14.6mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
80m
Dial Color
Black
Jewels
31j
Frequency
36,000 bph
Power Reserve
53 hours
Year
1972

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