Seiko Cal. 5223 - 638

Seiko 5223-638

The Seiko 5223-638 represents an important milestone in Seiko's 1978 lineup. Powered by the 5223 caliber with 30j jewels beating at 28,800 bph, it delivers a 69 hours power reserve. [seikata-wm-82b9328ba7e1]

Also known as: Navigator, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
46mm
Case Thickness
10.8mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Blue Sunburst
Jewels
30j
Frequency
28,800 bph
Power Reserve
69 hours
Year
1978

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