Swiss gold watch made for the Royal House of Romania Circa 1850

Gold hunting cased cylinder pocket watch 
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A very fine and rare Swiss thin 18K gold and enamel hunting cased cylinder pocket watch made for a member of the Royal House of Romania, circa 1850. Engine-turned case, reeded band, the front cover decorated with a finely painted coat of arms and the motto Quae Nocent Docent (what harms, teaches in English), the back cover with multi-coloured translucent champlevé enamel initials AC beneath a Royal crown. Hinged gold cuvette. White enamel dial with small radial Roman numerals, outer minute track and blued steel Breguet hands. A frosted gilt movement, bar calibre, eight jewels, cylinder escapement, three-arm gilt balance, blued steel flat balance spring, index regulator. Cuvette signed.
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Diameter: 45.5 mm
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Signed: J. F. Bautte & Cie Genève
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The case is slightly rusted.
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Bautte & Cie. Jean-François Bautte was born on March 26, 1772. He was apprenticed at twelve, successively learning the crafts of case maker, engine-turner, watchmaker, jeweller and gem-setter. He was barely nineteen years old when he put his name on his first watch. Two years later, in 1797, Bautte took case maker Moulinié as a partner and in 1804, the firm Moulinié & Bautte was joined by watchmaker Jean Gabriel Moynier, the name of the company first becoming Moulinié, Bautte & Cie, then being renamed Moulinié, Bautte & Moynier. By this time, Bautte was the most important dealer in Geneva.