Seiko Cal. 5231 - 697

The 5231-697 is a sought-after Solar piece from Seiko's golden era. Powered by the 5231 caliber with 18j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-c151f4c2a88e]

Also known as: Helmet, UFO

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

9.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

18j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1995

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