Seiko Cal. 4456 - 638

The Seiko 4456-638 represents an important milestone in Seiko's 1970 lineup. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-d51354dae6ef]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

110m

Dial Color

Silver

Jewels

35j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1970

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