Seiko Cal. 6633 - 312

The 6633-312 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6633 caliber with 36j jewels beating at 21,600 bph, it delivers a 41 hours power reserve. [seikata-wm-aea08be22a7d]

Also known as: Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Cream

Jewels

36j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1995

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