Inaccurately refinished dial. Only very rare Tudors were originally co-signed Rolex (mostly in the '30s, and only marketed in certain British Commonwealth regions) and these date from before the introduction of the Tudor line as a specific brand under the Rolex umbrella).
Tudor did produce a true Roman-Arabic ("California") dial sporadically from the '70s until about 10 years ago. Here is one I used to own.