Seiko Cal. 6650 - 258

The 6650-258 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6650 caliber with 27j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-7eee17f55d02]

Also known as: Tuna, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

13.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

30m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1975

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