Seiko Cal. 6136 - 648

Seiko 6136-648

The 6136-648 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6136 caliber with 31j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-e72a8510e4ef]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Quartz
Case Material
Two-Tone
Case Width
41mm
Case Thickness
8.6mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
130m
Dial Color
Green
Jewels
31j
Frequency
36,000 bph
Power Reserve
67 hours
Year
1981

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