Seiko Cal. 4421 - 740

Seiko 4421-740

The 4421-740 is a sought-after Hand-Winding piece from Seiko's golden era. The Coin-Edge bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-b32e99e4f7df]

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
44mm
Case Thickness
8.5mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
170m
Dial Color
Burgundy
Jewels
21j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1972

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