Seiko Cal. 5660 - 645

The 5660-645 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5660 caliber with 25j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-2dcee247bc2c]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

8.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

25j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1970

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