Seiko Cal. 5661 - 368

The 5661-368 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5661 caliber with 33j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-e59a7183ef90]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1971

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