Seiko Cal. 6650 - 402

The 6650-402 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6650 caliber with 22j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-9435c48b8010]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Black

Jewels

22j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1972

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