During the 19th century, it belonged to Archduke Stephan Franz Victor of the House of Hapsburg-Lothringen, Palatine of Hungary, who also had an impressive handlebarmustache.
After a final proof, each flat had to be initialed by me and the production manager before it went in the transport box, which was carried away by the courier, a Vietnam vet with a logo-festooned jacket and handlebarmustache.