Seiko Cal. 0731 - 218

The 0731-218 is a sought-after Automatic piece from Seiko's golden era. Powered by the 0731 caliber with 26j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-971201ee9f5a]

Also known as: Bullhead, Baby Tuna

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.5mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Champagne

Jewels

26j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1977

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