We have a Rat Terrier with exactly those markings!
Most of them are black and white, but ours is black and brown, like the one in your photo.
GREAT dogs, by the way. Lot’s of personality and they hate rodents.
;)
We’ve had Weims through the years. The guy we have now (rescued a 5, and he’s 12 now) is a rat catcher. We have fruit rats in the yard and he can find them and snap their neck in a second.
Weiim before this caught birds. He could catch them in flight, or if they were sitting in our hedge, he’s just reach in and get them, and Weim before that it was squirrels, she’d stalk the squirrel for 1/2 hour just waiting for it to get far enough from the tree, then she’d cut off their return.
All the same breed, but each seems to have had their preference.
My family had a black and tan rat terrier (formally, a Toy Manchester Terrier) when we were kids. It was smart as a whip, energetic, and with a great personality. My mother even trained it to get my two younger brothers up in the morning on command.