Seiko Cal. 4540 - 987

This Spring Drive model from 1977 features a 43mm Titanium case. Powered by the 4540 caliber with 29j jewels beating at 36,000 bph, it delivers a 43 hours power reserve. [seikata-wm-8c5b00729aac]

Also known as: Rally, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Champagne

Jewels

29j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1977

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