Packet of Illingworth's slow gas developer, wrapped in silver foil pactek and printed paper wrapper. Illingworth's Slow Gas Developer 1924
3 packets of Velox developing powder, silver foil with paper sleeves. Three Packets of Velox Developing Powder 1934
Six Socially Acceptable monitoring instruments (S.A.M.I.) units, 1961-1970 Six Socially Acceptable monitoring instruments (S.A.M.I.) units 1961-1970
