Welcome to the forums! Let me suggest you introduce yourself with a few words hete and then re-post the photos and description in ‘The Kitchen Knife’ subforum to get more attention. I am sure we can help you to get this sorted out.
I can sorta see that just past the middle toward the tip, but wasn’t sure if that’s the shadow or something. I also thought it was perhaps the KU getting stripped off, which hasn’t been very durable from the ones I’ve had anyway. Either way, more info from the OP would help