A shivrai was a copper coin.
Chhratapati Shivaji Maharaj ascended the throne of the Swaraj. When Shivaji Maharaj became Chhatrapati of the Swaraj. As a symbol of sovereignty, the Rajyaabhisheka Shaka (The Coronation Era) was started. Maharaj became the founder of a new Era. On the occasion of a coronation, special coins were minted- a gold coin called Hon and a copper coin coin called Shivrai with a legend Shri Raja Shivachhatrapati inscribed on them. Thereafter, all royal correspondence((Rajpatra)) carried the words, Kshatriyakulaawatansa Shri Raja Shivachhatrapati.