Seiko Cal. 6633 - 181

The 6633-181 is a sought-after Hand-Winding piece from Seiko's golden era. The Rotating bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-bd556ea9b293]

Also known as: Tuna, Helmet

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

41mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

28j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1998

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