Seiko Cal. 6140 - 831

Released in 1977, the Cal. 6140 with design code 831 was part of Seiko's domestic market collection. Powered by the 6140 caliber with 29j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-f9e7033ea531]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1977

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