Seiko Cal. 0770 - 257

Seiko 0770-257

The 0770-257 is a sought-after Spring Drive piece from Seiko's golden era. It features a Cream dial protected by a Hardlex crystal and offers 70m of water resistance. [seikata-wm-304f985983f4]

Also known as: Monster, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
10.7mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
70m
Dial Color
Cream
Jewels
19j
Frequency
21,600 bph
Power Reserve
58 hours
Year
1986

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