Seiko Cal. 6240 - 340

The 6240-340 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6240 caliber with 20j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-21ff9b172010]

Also known as: Helmet, Crown

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

20j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1987

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