Shipping worldwide If you cannot order certain product contact us! Make sure all products ordered from us are legal in your country, we are not responsible for breaking lawsuits corelated with purchase of our products I have an old samurai sword for sale, there is a natural patina on the sword's scabbard. You can see the natural hamon under the light. The sword is attached with a single pin. The whole thing gives the impression of being handmade. Period - unknown Sword is over 60 years old In the last photo you can see the hardening line in the form of micro “streaks”, below I copied the possible causes according to google **Quenching** - During the quenching (hardening) process of a sword, the metal is heated to a high temperature and then cooled quickly in water or oil. If this process is not done properly, streaking can occur, especially in areas where the metal was not cooled evenly. **Corrosion** - If the sword has not been properly stored or maintained, corrosion can occur, especially in humid environments. Streaking can be the result of chemical reactions occurring on the surface of the steel. **Oiling* - When maintaining the sword, the steel is often oiled to prevent corrosion. If the oil is not evenly distributed or not properly wiped off, streaking may occur on the surface of the metal. Translated with DeepL.com (free version)