The plaques with apostles of around the latter date on the Holy Crown of Hungary show a unique transitional phase, where the base plaque has hammered recesses for the design, as in "senkschmelz" work, but the enamel covers the whole plaque except for thick outlines around the figures and inscriptions, as in the "vollschmelz" technique (see the gallery below for examples of this technique and "vollschmelz" work). Some 10th-century pieces achieve a "senkschmelz" effect by using two plates superimposed on each other, the upper one with the design outline cut out and the lower one left plain.