Hello.
Inside SEAGULL ST2555.
Overall, it looks like this is not ceramic, but steel + PVD. Check if there is a roller on the CG lever: it should not be on ceramic 508s.
Steel ZF 508 with PVD, but the appearance of ceramic cases was not nearly cheaper than ceramics when it appeared, but today this is no longer so relevant.
Models with SEAGULL usually cost $ 50-100 cheaper than models with A7750.
I estimated my ceramic V6F PAM508 with A7750 about $ 300-350 when I made the exchange, if my memory serves me right.