A label on the underside of the foot, reading: "acheté à Rhodes, 1905." Jean Audy (1906-1962), Paris. Archéologie, Millon & Associés, Paris, 21 May 2008, lot 287
The L.C. Group is named for painters of late Attic calyx-kraters. Designed for use at a symposium, or drinking party, this dinos has a wide mouth allowing easy access to its contents—wine mixed with water (and sometimes other ingredients for flavoring). While drinking, symposiasts would often recite poetry and celebrate the mythological exploits of gods and heroes, perhaps prompted by the images painted on their pottery.
For a closely-related example, in terms of the shape and subject, compare the dinos in Leiden, pp. 34-35, pls. 192.1-4 and 195.1 in M.F. Vos, Corpus Vasorum Antiquorum, the Netherlands, Leiden, Rijksmuseum van Oudheden, Fasc. 4.