Seiko Cal. 5240 - 991

The 5240-991 is a sought-after Spring Drive piece from Seiko's golden era. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-ce3d3f84e67b]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1978

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