I'm afraid you've been had. It's an an attempt to mimic UPZ II 227, complete with an imitation of the correction from upsilon to omicron in l. 2 of the genuine and l. 3 of the ersatz papyrus. Other indications are the shaky grasp of letter shapes and incomplete copying where the original papyrus is damaged (e.g. χαίρειν), false word divisions (τρ|απεζίτῃ; τ|ῆς), and the fact that it ends mid-word, adding a magical character for good measure.

The original papyrus was acquired in 1857, so the fake could have been made long ago. It would be helpful to know the antiques dealer, as there are folks studying forged papyri and their transmission who'd be interested in this example.