Here it is cleaned up:
Here is some research carried out by Ben:
Vet’s bottle found close-by same day, intact, with glass stopper. Embossed “ELLIMAN’S ROYAL EMBROCATION FOR HORSES MANUFACTORY SLOUGH” Possibly late Victorian, but was still about in 1980. See below.
Greetings from Finland! I have a bottle with the embossed text: "ELLIMAN´S ROYAL EMBROCATION FOR HORSES MANUFACTORY SLOUCH". The height is 19cm and it is a BIM style bottle with a crown top and a second lip under the crown. The colour is clear with perhaps a slight tint of green (seen esp. in the thick bottom). The base is smooth and has an embossed "4" in the center and "11338" at the edge of the bottom (not on the side). The bottle itself is in mint condition, although the label has suffered some minor damage. It is still 99% legible and almost fully clean & white. The label says it helps for rheumatism, sore throat, sore shoulders & backs, capped hocks and elbows, broken knees etc. At the bottom of the label there is a reference to "the E.F.A. Booklet enclosed with this bottle, and the Elliman First Aid Book, pages..., 5th edition". This reference is for horses, cattle, dogs and birds.