- 1Archival material relating to the firm of H.N. Irving & Son, instrument makers (IRV)
c. 1950 – 2005, fonds - 2Business correspondence and invoices (IRV/A)
c. 1950 – 2005, series - 3Order books and cash books (IRV/C)
c. 1950 – 2005, series - 4Design drawings (IRV/D)
c. 1950 – 2005, series - 5Photographs (IRV/E)
c. 1950 – 2005, series - 6Promotional literature (IRV/F)
c. 1950 – 2005, series - 7Certificates (IRV/G)
c. 1950 – 2005, series - 8H.N. Irving & Son promotional literature (IRV/F/1)
c. 1950 – 2005, series - 9Promotional literature of other manufacturers (IRV/F/2)
c. 1950 – 2005, series - 10Ephemera (IRV/J)
c. 1950 – 2005, series
