Seiko Cal. 5660 - 810

The Seiko 5660-810 represents an important milestone in Seiko's 1975 lineup. The Coin-Edge bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-463d9213c3ea]

Also known as: Monster, Bellmatic

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1975

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