Seiko Cal. 0731 - 436

Seiko 0731-436

The 0731-436 is a sought-after Solar piece from Seiko's golden era. Powered by the 0731 caliber with 36j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-2c7845f3373f]

Also known as: Bullhead, World Timer

Specifications

Movement
Solar
Case Material
Two-Tone
Case Width
44mm
Case Thickness
13.1mm
Lug Width
19mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
White
Jewels
36j
Frequency
28,800 bph
Power Reserve
64 hours
Year
1990

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