Seiko Cal. 4540 - 744

The Seiko 4540-744 represents an important milestone in Seiko's 1973 lineup. It features a Green dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-d87450d97a11]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1973

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