Seiko Cal. 5644 - 321

Seiko 5644-321

The Seiko 5644-321 represents an important milestone in Seiko's 1975 lineup. Powered by the 5644 caliber with 33j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-013ca1a52222]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
36mm
Case Thickness
11.7mm
Lug Width
20mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
Blue Sunburst
Jewels
33j
Frequency
28,800 bph
Power Reserve
65 hours
Year
1975

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