Seiko Cal. 6138 - 531

Seiko 6138-531

The 6138-531 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6138 caliber with 21j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-7f9f9e5463c7]

Also known as: Turtle, Sumo

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
13.3mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
Green
Jewels
21j
Frequency
36,000 bph
Power Reserve
55 hours
Year
1984

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