Seiko Cal. 5640 - 240

This Hand-Winding model from 1966 features a 34mm Hardlex-Coated Steel case. The Coin-Edge bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-f3fdaf8da3f4]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Burgundy

Jewels

34j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1966

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