Seiko Cal. 0730 - 740

Seiko 0730-740

This Hand-Winding model from 1982 features a 40mm Hardlex-Coated Steel case. Powered by the 0730 caliber with 21j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-638c61c3bf6e]

Also known as: Sumo

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
10.2mm
Lug Width
22mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
50m
Dial Color
Navy
Jewels
21j
Frequency
28,800 bph
Power Reserve
46 hours
Year
1982

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