This is an inherited seal from 1900s. It is one of Reza Shah Pahlavi (commonly known as Reza Shah) seals . The jade is engraved with farsi caligraphy saying "Reza Shah". The stone is grade A jade and is 33.4000 Carats.
General Antiques and Collectibles
"Reza Shah" engraving written in Farsi calligraphy. Engraving of a horse rider on the back.