Seiko Cal. 6633 - 306

Seiko 6633-306

The 6633-306 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6633 caliber with 30j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-543504bf5d93]

Also known as: Monster, Tuna

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
34mm
Case Thickness
8.5mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
170m
Dial Color
Champagne
Jewels
30j
Frequency
28,800 bph
Power Reserve
60 hours
Year
1980

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seikata-wm-543504bf5d93