Seiko Cal. 6620 - 388

Seiko 6620-388

The 6620-388 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6620 caliber with 33j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-bbbb03ab142d]

Also known as: Sumo, Silverwave

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
41mm
Case Thickness
14.9mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
120m
Dial Color
Navy
Jewels
33j
Frequency
36,000 bph
Power Reserve
52 hours
Year
1987

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