Panerai is a brand of Italian watches that is headquartered in Florence but manufactures watches in Switzerland using both movements manufactured in-house and movements manufactured by ETA S.A.
Giovanni Panerai (1825–1897) founded Officine Panerai in Florence, Italy in 1860. Officine Panerai later became the official supplier of the Regia Marina (Royal Italian Navy) and expanded to building precision instruments. The company is famous for its Radiomir and Luminor watches, notable for their use by Italian commando frogmen, who relied upon their Panerai wristwatches to execute the sinking of Allied naval vessels in WWII.
The actor Sylvester Stallone spotted and bought a Panerai Luminor in a jewelry store in Rome in 1995 to wear during shooting of the film Daylight. Stallone ordered a small batch of such watches with his signature on the case back, called Slytech, offering some as gifts to friends.