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Seiko 5 Automatic Watch - SYME64

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Seiko 5 Automatic Watch - SYME64
Name SYME64
Style Dress
Gender Women's
Movement 4207
Diameter 27mm
Thickness 12mm
Shape Round
Material Stainless Steel
Water Resistance 50 Meter
Crown Position 03:00
Minute Hand Yes
Second Hand Yes
Day Yes
Date Yes
Band Size 14mm
Band Color Gold, Silver
Band Replaceable No / Difficult
Bezel Color Gold
Crystal Material Hardlex
HourMarks Bars
Brand Seiko


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Description:
The Seiko "4207" mechanism is designed for Ladies' watches. It measures about 17mm in diameter. It uses a ball bearing quarter-arc rotor and can be hand-wound.

The 4207 is a tiny movement which also uses an equally tiny main spring. Its power reserve is significantly smaller than the 7s caliber which has a bigger main spring. The smaller mass of the oscillating rotor may also mean that automatic winding is less efficient compared to the bigger mass of a typical 7s rotor. Therefore, it makes sense to add a manual wind feature to assist in keeping the main spring fully wound. The 4207 doesn't hack and thus cannot be synchronized to a time source. Seiko decided that this feature probably was not important for the target consumer.


Item created by: Lethe on 2015-08-10 17:31:05

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