Seiko Cal. 5644 - 471

The 5644-471 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5644 caliber with 31j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-1c62bfaec3a3]

Also known as: Turtle, UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1973

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