William Calvert was an electrotypist and ornamental printer who produced a series of electroplated medals for the Intercolonial Exhibition of Australasia, Melbourne in 1866 (NU 18562 etc).
The history of William Calvert's business has been documented in 'Samuel Calvert', in Appendix 1. 'Notes on Some of the Printmakers and Artists', in Craig, Clifford. More Old Tasmanian Prints. A companion volume to The Engravers of Van Diemen's Land and Old Tasmanian Prints, Foot & Playsted: Launceston, 1984, p.302. ISBN 0-9599873-4-7.
'1858 or 1859. Neave's Buildings, Collins Street East, Melbourne. "Printer". (Ferguson)
1860 or 1861. 87 Collins Street West, Melbourne. "Printer". (Ferguson)
Printer and/or Publisher
1858, 1859, 1860. 62 Collins Street East, Melbourne. SK.
1869, 1870, 1871, 1872. 89 Little Collins Street East, Melbourne. SM.
Engraver and/or Lithographer
1859, 1860, 1862. 62 Collins Street East, Melbourne. SK.
1872. 89 Little Collins Street East, Melbourne. SM.
In 1858 W. Calvert, printer and publisher, [was] at 62 Collins Street, east. By 1869 William Calvert, electrotypist and ornamental printer, was in business at 89 Little Collins Street, east, and resided at Kew.'
National Gallery of Australia website http://www.australianprints.gov.au/Ausprints/Detail.cfm?ArtistID=6048&ZoomID=5