"Walking Lion"
Antoine Louis-Barye
Engraving by Firmin Gillot
Circa. 1870
11 1/3 x 7 3/4 (21 3/8 x 17 1/2 frame) inches

This is "Walking Tiger," along with "Walking Lion" are very rare prints by Antoine Louis-Barye based on the famous bronze sculptures of the same name. The signatures most likely represent these proofs were done by the master printer from the highly esteemed house of Firmin Gillot.
These are very rare prints and perhaps unique. 

Antoine Louis-Barye "Walking Lion" Engraving by Firmin Gillot ca. 1870