No matter how good the quality of replica watches they still have an inherent fragility that isn’t exhibited in the genuine watch they copy. Either subject to finicky movements, loose crown stems, or non-existent water-resistance; fake watches may look like their genuine counterparts, but rarely live up to their standards.
Most people wouldn’t be familiar with IWCs, let alone discontinued models from the late twentieth century, so the chances of being called out on this are minimal. It’s got a solid ETA movement, a superb case design and one of the best bracelets in the replica watch game. While the clasp is prone to looseness, I believe this is just on my model and is not a design flaw. I’ll know more once I’ve taken my rat-tail file to the parts.
All in all, this Rolex DateJust was released very quietly and wasn’t popular at all, due in part to the bezel printing and some misaligned 12 o’clock markers on the dial. However, I still think it’s a decent watch and you should consider getting one as it’s a much nicer design, in my opinion, than the Ingenieur.