Seiko Cal. 4540 - 478

The 4540-478 is a sought-after Spring Drive piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 200m of water resistance. [seikata-wm-0e94c1d3c9f1]

Also known as: Bullhead, Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1975

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