Seiko Cal. 6658 - 850

The 6658-850 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6658 caliber with 17j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-e7b0a8302f54]

Also known as: Tuna, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

44mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1968

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