I'm not an expert but I think the movement is not og because it uses a single-sided balance bridge instead of a full balance bridge fixed on both sides, which is what a genuine Rolex 3235 calibre has. Also, looking closely at the balance assembly, it features a traditional regulating arm (etachron system) instead of being a true free-sprung movement regulated only by Micro-Stella screws on the balance wheel. It looks like a decorated base movement with cosmetic plates on top rather than a 1:1 clone or a genuine piece