Seiko Cal. 4457 - 905

This Hand-Winding model from 1971 features a 43mm Two-Tone case. Powered by the 4457 caliber with 20j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-2f45209fe1fb]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1971

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