Seiko Cal. 4421 - 633

Seiko 4421-633

The 4421-633 is a sought-after Quartz piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 90m of water resistance. [seikata-wm-0b0db55d99b5]

Also known as: UFO, Arnie

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
42mm
Case Thickness
15.1mm
Lug Width
22mm
Crystal
Mineral
Bezel
Fixed
Water Resistance
90m
Dial Color
Black
Jewels
32j
Frequency
21,600 bph
Power Reserve
65 hours
Year
1991

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