I bought this little Cosmo Mfg., Germany razor for next to nothing on the bay ($27 USD).
Ha ha i never bought so expensive razor
take shubler measuring device and a permanent marker make the edge black and get the dimention from the base of the chip to the line of the spine wear .
scetch the new edge line and take all down on the grinder .then reset the bevell again from a square point
As i restore a lot of old blades i do this permanent and it works perfect .