Thread: Looking for help identifying Swiss razor.

I just got this razor from my Swiss relatives. Now I am trying to find out more about it. All I know is that it was purchased in Chaux de Fonds, Switzerland. This is also stamped on the tang: Ch. Kaelin, Chaux-de-Fonds. So far, my search on the internet has not brought any results.
My question: does anybody know of this manufacturer or anything about this razor, like age or value? The blade appears to be 4/8 with 5 5/8” overall length.
Should I attempt to restore it or is it best left as is. After an initial honing the edge is now perfect and gives a very nice, smooth shave. The blade has some rust issues. I am also wondering if the scales are plastic or ivory. How can one tell?
Any insight is much appreciated.
Thank you all.