Seiko Cal. 5657 - 133

Seiko 5657-133

The 5657-133 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5657 caliber with 20j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-f7bcc3b31979]

Also known as: Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
14.6mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
140m
Dial Color
Navy
Jewels
20j
Frequency
36,000 bph
Power Reserve
42 hours
Year
1965

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seikata-wm-f7bcc3b31979