Seiko Cal. 0731 - 770

Seiko 0731-770

The 0731-770 is a sought-after Automatic piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-87f6586bb0a6]

Also known as: Navigator

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
11.2mm
Lug Width
19mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
100m
Dial Color
Silver
Jewels
17j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1981

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