Harrison and Sons Limited was a major worldwide engraver and printer of postage stamps and banknotes. Factory in Hayes, Middlesex opened 1910.
Those wishing to research further would do well to consult:
http://discovery.nationalarchives.gov.uk/details/rd/a0a4a3d9-f66b-4b3f-b095-0f2283492dea
http://www.stampprinters.info/14p41%20PRINT%20GB%20Harrison%20Timeline%20KGII%20to%20KGVI.pdf
http://www.jnbarcock.co.uk/My%20Times%20at%20Harrison%20&%20Sons%20Ltd..html
