provenance: measurements:15 inches square weight:9 3/4 lbs. This tray is accompanied by two reports: one from Oxford indicating that the tray was fired during the 20th century and another from Scientific Analysis of Fine Art, LLC. indicating that the cobalt and other elements of the tray are consistent with a Yuan date, and that the implementation of tinned-iron staples (now missing) were accompanied by a second firing (shown in the supporting documentation) resulted in the Oxford findings of a 20th century date.