Seiko Cal. 6658 - 693

The 6658-693 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6658 caliber with 26j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-f909da081de1]

Also known as: Helmet, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

60m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1980

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