Seiko Cal. 6657 - 884

This Solar model from 1966 features a 45mm Two-Tone case. Powered by the 6657 caliber with 20j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-2a30ae72a77c]

Also known as: Helmet

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

10.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Navy

Jewels

20j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1966

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