Panerai is a watch manufacturer founded in Florence in 1860 by Giovanni Panerai, now headquartered in Neuchatel and owned by Richemont since 1997. Its principal collections are the Luminor, Radiomir, Submersible and Luminor Due. Panerai originally supplied diving instruments to the Royal Italian Navy, patenting the Radiomir luminous compound in 1916 and the tritium-based Luminor in 1949, and the cushion case with wire lugs and crown-protecting bridge remains its defining design. In-house calibres include the P.9010, P.900 and the eight-day P.2002.