Seiko Cal. 0731 - 375

Released in 1976, the Cal. 0731 with design code 375 was part of Seiko's domestic market collection. Powered by the 0731 caliber with 22j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-a83fb94df67c]

Also known as: Tuna, Rally

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

10.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1976

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