ジラールペルゴのインスタグラム(girardperregaux) - 5月14日 02時27分

New Minute Repeater, Annual Calendar and Equation of time.

The Equation of Time is displayed at 4:30 on the dial. It shows the difference between civil time and solar time. For, in reality, the solar day varies in duration from day to day. While the two reference times in question coincide exactly four times per year, the accumulated difference between them can be as much as, for example, 16 minutes in November.

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[BIHAKUEN]UVシールド(UVShield)

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