Seiko Cal. 6644 - 771

Seiko 6644-771

The Seiko 6644-771 represents an important milestone in Seiko's 1965 lineup. Powered by the 6644 caliber with 30j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-ff42146f23e6]

Also known as: Turtle, Emperor

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
14.9mm
Lug Width
18mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
120m
Dial Color
Champagne
Jewels
30j
Frequency
28,800 bph
Power Reserve
52 hours
Year
1965

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