A simple composition, concentrating on the bird with a few branches to place it, none of those heavy black borders that are so often seen. As you can see this one is signed in pencil "M E Philipp" and monogrammed MEPH26 within the plate. Luckily it came in it original frame with original paper label, from which you can read that "Only a short limited edition has been issued. The plates ultimately will be destroyed" - how big was the edition ? 10, 25 ? 500 ? who knows, a bit of marketing there.
And what is a Throstle bird ?? well apparently it is an old English dialect name for the common Song Thrush (Turdus philomelos) and also known as a Mavis. I was a bit surprised to learn this as Martin's example does not look like the in my garden !
For more picture and information about Martin Erich Philip, then I would refer you to Gerrie the Linosaurus, who is particularly keen on this artist and has pages devoted to his work.