I’ve seen quite a few Castellos with no white bar on the stem. I don’t know if they were also replacements or not. I have seen a few that have a sort of stamping from the factory on the bottom , but no white bar. I’ve also seen some where the bar has fallen out, and in the right light or angle, it can look like it was never there in the first place.Hmmm... I'm not going to pretend like I know anything about castellos.
But... Don't their stems have the thick white line???
See... I know nothing