Edmund Osthaus Print

Hello, I am not necessarily concerned with the value of this print I found today at a thrift store- what is driving me crazy is that even though there are hundreds of images for Edmund Henry Osthaus paintings, I cannot find that this one exists. It certainly looks like his work, but I find it odd that I can't find the name or any image of it anywhere.
The painting/print I picked up is clearly old, but it kind of feels like it was something that could have been mass produced. There is a stamp on the back of it, but it's wasn't even stamped properly it appears.
I truly know nothing about art- I am a volunteer for Shetland Sheepdog and Collie rescues and so I am always on the lookout for dog art or collie/sheltie pieces. This artist also does a lot of collie art, so I had to have it. Now I'm just incredibly curious as to why I can't find the name of it or anything when I search multiple search engines and image searches. I would love if anyone can identify this for me and if you can tell if this is just a complete fake, or whatever you might be able to find.
Thanks!