Respectfully, if one is interested in buying a particular 4-digit sport Rolex, it's a good idea to spend a few months taking a really deep dive into every detail of that reference. Look at thousands of examples and read everything you can find. Asking open-ended questions in a thread like this has limited value. You will get answers and speculation from various sources, but ultimately you need to be able to rely on your own expertise. Once you have fairly deep knowledge about the reference, if there is a fine detail that still concerns you, you can PM a top expert and ask focused and educated questions.
Another option is to increase your budget, and buy a top-notch watch from a well-known dealer or auction house. Even then it's good to be able to use your own judgement.
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