Seiko Cal. 6633 - 310

Released in 1976, the Cal. 6633 with design code 310 was part of Seiko's domestic market collection. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-fa3bb16def33]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

White

Jewels

18j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1976

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