3rd-5th century AD. A mould blown glass flask with a broadly piriform body, flared neck and rolled lip, formed as the head of Jan with two faces, detailing to the curly hair and stylised faces, one face wearing an aggrieved expression, the other a serene one; iridescent surfaces. 19.8 grams, 72mm high (2 3/4"). Collection of a deceased London gentleman, 1969-1999.