Seiko Cal. 5644 - 613

The 5644-613 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5644 caliber with 19j jewels beating at 36,000 bph, it delivers a 39 hours power reserve. [seikata-wm-cf80269e214b]

Also known as: Turtle, Flighty

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1980

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