Seiko Cal. 6633 - 305

The 6633-305 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 72 hours power reserve. [seikata-wm-c4162fa3aad2]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

72 hours

Year

1972

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