This is a vintage Geneva Cutlery 5/8 hollow ground straight razor with celluloid scales. The blades from Geneva Cutlery Corp out of Geneva, NY (circa 1902-1935) have collectable status, and are widely known as excellent shavers.
This blade is in "very good"/"excellent" condition, with only the lightest patina on the blade and tang. There are some light scratches on the top side of the blade that appear to be from previous honing or cleaning. The scales are in excellent condition, with a nice snug pin.