Seiko Cal. 5687 - 730

The 5687-730 is a sought-after Solar piece from Seiko's golden era. Powered by the 5687 caliber with 25j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-18fdd3ac3ff3]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1991

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