Seiko Cal. 6643 - 355

This Spring Drive model from 1986 features a 45mm Hardlex-Coated Steel case. Powered by the 6643 caliber with 31j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-f882d1cbc96b]

Also known as: UFO, Flighty

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Champagne

Jewels

31j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1986

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