Scrub it clean, let the handle dry for 24 hours then oil it. Looks very similar to a Robinson handle and if so will darken beautifully once oiled. Blade may have to be thinned as it looks to have been shrunk from sharpening over the years. Nothing major at all going on there compared to some old carbon steel blades, nice patina, no cancerous rust or whacked geometry.
Treat the handle, sharpen it, and make dinner.