A little to one side of the original posting, but I thought I would share a genuine 1954 photogravure copper plate prior to chroming (hardening). It is from Harrison & Sons and was for their ship promotional label sheet.
Do intaglio plates ever come on to the market?
GLENN MORGAN

The full unchromed printing plate.

A close-up of a single dummy stamp part of the above plate.

The printed sheet.