Glossary of watchmaking - Fondation de la Haute Horlogerie

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Lapidary

Lapidaire | 宝石加工職人／ホウセキカコウショクニン | 宝石工

A craftsman who cuts, polishes and sells coloured and precious stones. A lapidary who specializes...

Lapis lazuli

Lapis-lazuli | ラピスラズリ | 天青石

A rich blue opaque gemstone often used in watch dials. It is specked with pyrite that looks like...

Large date

Grande Date | ラージデイト | 大型日期显示

A date function with large numerals on two independent discs, displayed through oversized...

Lathe

Tour | 旋盤／センバン | 车床

A machine-tool that rotates a workpiece while applying a cutting tool to give the piece the...

Latitude

Latitude | 緯度／イド | 纬度

An angular distance that gives the location of a place north or south of the Earth's equator.

Leaf

Aile | 葉／ハ | 叶片

The tooth on a pinion.

Leap year

Année bissextile | 閏年／ウルウドシ | 闰年

Introduced by Julius Caesar in 45 BC as part of the Julian calendar, the leap year was already...

Leap year calendar

Quantième bissextile | 閏年カレンダー／ウルウドシカレンダー | 闰年日历

The Leap year calendar takes automatically into account months with less than 31 days and of...

Leather

Cuir | 皮／カワ | 皮革

An abbreviated means of referring to a leather watchstrap.

Legal time

Temps légal | 法定時／ホウテイジ | 法定时

The time which is, by law, that of all the inhabitants of a country.

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