Seiko Cal. 7163 - 640

Seiko 7163-640

The 7163-640 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 7163 caliber with 31j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-db9c0a6fcea6]

Also known as: Helmet, Navigator

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
45mm
Case Thickness
12.7mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
200m
Dial Color
Silver
Jewels
31j
Frequency
21,600 bph
Power Reserve
43 hours
Year
1996

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