Seiko Cal. 6690 - 658

The 6690-658 is a sought-after Solar piece from Seiko's golden era. Powered by the 6690 caliber with 18j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-da24c461cef1]

Also known as: Tuna, Goldfeather

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

White

Jewels

18j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1973

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