Riddick collection No. 12 – Summary of a rarely discussed and uncataloged plaquette bust of Caesar probably cast after a Renaissance or Baroque gem.
Riddick collection No. 02 – An in-depth discussion of bronze casts reproducing the celebrated Tazza Farnese, linked to a modern facture in the Chiurazzi foundry of Naples and an unidentified foundry probably in Florence.
Riddick collection No. 03 – A unique, modern bronze cast of the famed Gemma Augustea.
Riddick collection No. 04 – Summary of a rare plaquette reproducing the classical “Felix Gem,” probably cast in Rome under the auspices of Pietro Barbo (future Pope Paul II).
Riddick collection No. 17 – Summary of a rarely discussed plaquette of Asclepius, reproducing an antique gem probably belonging to the Medici in Florence.