Seiko Cal. 6658 - 352

The Seiko 6658-352 represents an important milestone in Seiko's 1971 lineup. With its 19mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-0e26801c847e]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

15.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1971

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