Seiko Cal. 6610 - 231

Released in 1965, the Cal. 6610 with design code 231 was part of Seiko's domestic market collection. Powered by the 6610 caliber with 24j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-6ac223b7eb4a]

Also known as: Sumo, Rally

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1965

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