Here is a thread about Kropp.
https://sharprazorpalace.com/razors/...out-kropp.html
I don't personally know a lot about them but I know that they are well respected. The one I have is an excellent shaver. Your razor was rescaled. Probably the original scales broke and these were available. From what I can see in the pictures it looks like a thorough cleaning and honing will have it in good shape, although the one picture does show some rust at the edge which could be problematic. If it was an heirloom I would not recommend taking on this project yourself if you are not experienced in refurbishing. It would be a shame to have it go badly for you.