I believe it is from 1892 but it’s hard to make out.

I couldn’t find much about who they were. Searching for R.T. English lands loads of links to Russia Today’s english operations, and not much about equestrian products. Leaving out the R.T. results in saddles from England.

Anyway, they made this nice calendar. With R.T. English equestrian products you can appoint yourself like this lad.