Seiko Cal. 6257 - 433

Released in 1965, the Cal. 6257 with design code 433 was part of Seiko's domestic market collection. Powered by the 6257 caliber with 29j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-cb6dcdc7cba9]

Also known as: Tuna, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1965

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