General rule regarding Stiga blades: If the build quality is bad and if there are manufactoring errors...then the blade is genuine. If the built quality is better with no manufactoring errors, it's a fake one...
Just kidding. At first glance the blade looks genuine. The rosewood, being a rather old blade, has two versions, as far as I know. The old one had a plastic lens and the NCT coating was very shiny and therefore visible. The new version, which started about 5-6 years ago, has a metal tag and the NCT coating is apparently thinner because it is not really visible.
You seem to have the new version, and the additional pic you posted is also the newer version. While your blade looks genuine at first glance, the slight but still obvious misalignment of the letters is even for Stiga, with their oftentimes "dubious" quality control, a little strange! After all, these tags are mass produced after an original print. Misalignments of that sort shouldn't happen usually. But then again: stranger things have happened before and even Butterfly had a famous spelling error on the blade face of the Viscaria (around since 1993) which was corrected in 2015/16, I think.
Questions:
1. Where did you buy the blade?
2. Were (or are) the edges on the wings very sharpe that make the blade somewhat uncomfortable to hold? Stiga doesn't sand the wings, so it can be difficult/uncomfortable for the thumb and the index finger. Even fake blades or clones pay a little more attention to that...
3. Have you played with blade yet? If so, did you notice a distinctive hollow plong coming from the blade, and did you notice strong vibrations in your palm area? Stiga uses a soft glue for their all wood blades and they (more often than not) hollow our the handle caps; sometimes they also hollow ot the neck area (the area between the handle caps), giving the blades a distinctive audible and sensitive feedback. Fake blades, clones, replicas etc. usually don't bother with the hollowing out of handles; these blades tend to feel a bit more solid and harder (also because of the glue) than genuine Stiga blades.
4. Can you post some additional close ups, particularly from the side of the handle and the bottom of the handle? Maybe this will give us more impressions und infos.