Seiko Cal. 5657 - 399

Seiko 5657-399

The 5657-399 is a sought-after Hand-Winding piece from Seiko's golden era. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-f402d265d184]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
43mm
Case Thickness
8.8mm
Lug Width
20mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
100m
Dial Color
Burgundy
Jewels
30j
Frequency
36,000 bph
Power Reserve
46 hours
Year
1982

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seikata-wm-f402d265d184