Seiko Cal. 0728 - 731

Seiko 0728-731

The 0728-731 is a sought-after Solar piece from Seiko's golden era. Powered by the 0728 caliber with 25j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-9ac7fd03d2b5]

Also known as: Bullhead

Specifications

Movement
Solar
Case Material
Titanium
Case Width
45mm
Case Thickness
12.3mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
Black
Jewels
25j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1982

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