Seiko Cal. 5644 - 471

Seiko 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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