Seiko Cal. 0731 - 921

Seiko 0731-921

The 0731-921 is a sought-after Solar piece from Seiko's golden era. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-61fafd1d4edf]

Also known as: Rally

Specifications

Movement
Solar
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
14.5mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Navy
Jewels
24j
Frequency
28,800 bph
Power Reserve
43 hours
Year
1969

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