Seiko Cal. 6257 - 720

Seiko 6257-720

The 6257-720 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6257 caliber with 23j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-032f6b8c4ff3]

Also known as: Monster, Golden Tuna

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
41mm
Case Thickness
12.2mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
60m
Dial Color
Blue Sunburst
Jewels
23j
Frequency
28,800 bph
Power Reserve
51 hours
Year
1987

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