1934F103.4 Signet Matrix - Seal, 1770 Possibly made in Birmingham Presented by Francis Buckley, 1934. A 'signet' or 'seal matrix' is a small stamp used for impressing the mark of its owner in wax onto documents. This is one of a collection of twenty-seven acquired by the museum in 1934. The majority of examples are finely made of moulded translucent glass, in this case purple. Amusingly, the design is of a signet. The inscription, 'PUSH', refers to the action of impressing the signet into the surface of the wax!