Seiko Cal. 4540 - 740

The 4540-740 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4540 caliber with 19j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-5a7c5104ad29]

Also known as: Bullhead, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

8.5mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Champagne

Jewels

19j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1977

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