NOTE: Sid Lethbridge - The Giraffe Etching shows the animal in question facing to the left eating the leaves of a tall tree. For the purposes of my research the firm that did this etching has designated as U1 i.e. Unknown 1. They were very prolific and there are about 30 etchings that can be assigned to them.
Ref. Etched Pattern Glass, Acid Etched Goblets and Tableware of the 1880s, p 121