Could anyone give me any information about this glass bird with a silver head? The glass surface is scavo or acid etched with what looks like two applications of an aurene type spray. The silver hallmark is Italian from Padova, Veneto but there is a blank where the registration usually is (hallmark = "925" in an elipse beside a polygon containing a "star" on the LHS and "PD" on the RHS). The bird size is 100mm long. There are no markings on the glass. Photos attached.