Seiko Cal. 4540 - 601

The 4540-601 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4540 caliber with 29j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-bc3a55767909]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.3mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

180m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1971

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