Seiko Cal. 5621 - 331

Seiko 5621-331

The 5621-331 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Acrylic crystal and offers 70m of water resistance. [seikata-wm-750ef73a16b8]

Also known as: Tuna, UFO

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
44mm
Case Thickness
13.9mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
70m
Dial Color
Silver
Jewels
28j
Frequency
36,000 bph
Power Reserve
39 hours
Year
1970

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seikata-wm-750ef73a16b8