Seiko Cal. 0731 - 517

Seiko 0731-517

The 0731-517 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0731 caliber with 29j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-f96e827dfdba]

Also known as: Sportsmatic, World Timer

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
14.7mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
Black
Jewels
29j
Frequency
28,800 bph
Power Reserve
44 hours
Year
1984

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