Packet of Hypo for Enitone and Collodion Self Toning papers, in printed paper wrapper. Hypo For Enitone and Collodion Self Toning Papers Photographic Technology 1924
Packet of Illingworth's slow gas developer, wrapped in silver foil pactek and printed paper wrapper. Illingworth's Slow Gas Developer Photographic Technology 1924
Packet of acid-hypo for slow gas and bromide papers, and for plates and roll films. Acid Hypo For Slow Gas and Bromide Papers Photographic Technology 1924
