Seiko Cal. 5231 - 307

Seiko 5231-307

The 5231-307 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5231 caliber with 22j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-13660821c29b]

Also known as: Monster

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
34mm
Case Thickness
10.6mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
190m
Dial Color
Navy
Jewels
22j
Frequency
21,600 bph
Power Reserve
38 hours
Year
1969

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seikata-wm-13660821c29b