While technically from the Orientalist painting tradition, The Tortoise Trainer has been handled both more decisively and more directly (look, for example, at the exposed brick) than is usual for the genre.
That’s not without a cause, however. Indeed, Osman Hamdi Bey was a Turkish painter, albeit one with French training. And, as Christie’s points out, “Hamdi Bey’s paintings are typically rendered with a realism born from native experience, and which have little of the drama or voyeurism associated with western artists working in the genre.”
He painted The Tortoise Trainer in the first decade of the 20th century.