Seiko Cal. 6657 - 283

Released in 1967, the Cal. 6657 with design code 283 was part of Seiko's domestic market collection. Powered by the 6657 caliber with 33j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-0203040e5d3a]

Also known as: Sumo, Emperor

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Cream

Jewels

33j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1967

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