Maltese Cross. Vacheron Constantin, whose English name is VACHERON CONSTANTIN, is a Swiss watch brand founded in 1755 and headquartered in Geneva, Switzerland. The brand's watches in the 1950s and 1960s were engraved with a Maltese cross-style trademark pattern. The Maltese Cross was historically a symbol used by the Knights Hospitallers and the Knights of Malta. Its shape consists of four "V" letters.