This panel is a copy of the left wing of a triptych of 1476 by Neroccio de' Landi (Pinacoteca Nazionale, Siena). The Museum also owns a second copy after the same work (07.241). The panel imitates a biccherna cover, an account book of the Biccherna, the financial administrators of the commune of Siena. The reverse depicts twelve coats of arms and an inscription deciphered by Ceppari Ridolfi and Mazzoni [see Ref. 2002] as: INVENTARIO DE LE COSE DE LA SAGRESTIA DEL DUOMO E DE L'ALTRE COSE MOBILI DE L'UOPARA RIFATTO LA SICONDA VOLTA AL TEMPO DI MISSERE GIOVANNI DI PAOLO HOPARAIO PER L'OMC[. . .] OC[. . .] DI SIENA HOPARAIO DI DICIEB[RE] 1446.
Similar works, all attributed to Icilio Federico Joni (or Ioni; 1866–1946), are reproduced in Mirjam Foot, "Pictorial Bookbindings," London, 1986, ill. p. 37, and "Sembrare e non essare," Milan, 1993, ill. p. 227 (both British Library, London), Ref. Ceppari Ridolfi and Mazzoni 2002, ill. p. 85 (Západoceské Muzeum [West Bohemian Museum], Plzen, Czech Republic), and H. W. van Os, "Op het Spoor van een Vervalser," Spiegel: Historiael 6 (February 1971), fig. 4 (location unknown).