Ciappi, S. et al, Il vertro in Toscana: Strutture Prodotti Immagini (secc. XIII-XX),Poggibonzi 1995, Tav. XXVII.2 & p. 82
Shows a similar object in cacedonio, similarly mounted, from a private collection. The mount of that piece is rather closer in desingn to that of the green bowl 19-1867. In this publication a further piece in the Rithschild Coll. in New York is mentioned.
Tony North 16-12-1992: mount 19th century! Cf. mounts with: Rückert bd. I, nr. 400 (p. 155 & Taf. 110), emerald-green, 1st-3rd 17th century Theuerkauff-Liederwald 14-19-96: not 19th century. See also References.