Unusual French 18K gold Napoleon III 100 Francs coin watch Circa 1985

Gold coin watch by Bueche-Girod
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An unusual French 18 carat gold Napoleon III 100 Francs coin watch, circa 1985. Bridge movement, Glucydur screw balance. Gilt dial with hour indexes. The case is chased on both sides, a right-side profile portrait of French Emperor Napoleon III wearing a laurel wreath on the front inscribed Napoleon III Empereur and signed Barre (Albert Désiré Barre), the back shows the imperial mantle with coat of arms topped by a crown, the date 1869, the mark of the year A and the value of the coin 100 Frs., the edge with the lettering Dieu Protege La France (God protect France). Dial and movement signed, case numbered.
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Diameter: 35 mm
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Weight: 34 g
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Signed: Bueche-Girod Swiss made
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French Emperor Napoleon III 1808-1873.
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This coin watch dating from the Second Empire was engraved by Albert Désiré Barre. He was the second main engraver at the French Mint after his father Jacques-Jean. He held the position from 1855 until his death in 1878 and was succeeded by another member of the Barre family, his brother Jean-Auguste.
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The Swiss manufactory Compagnie des Montres Bueche-Girod SA (Bueche-Girod Watch Factory Ltd) was first based in Biel and then in Geneva. The company was deleted from the commercial register in 2003.