1970-90 India 10 Rupees Vintage Currency Note

This is an Indian 10 Rupees banknote from the 1980s–early 1990s series (likely Pick P-81 or similar variant, post-1970 "Ashoka Lion" design). Front: Ashoka Lion Capital (national emblem) on the right, large "10" in the center, "Reserve Bank of India" in English and Hindi, signature of the Governor (looks like C. Rangarajan era or nearby), serial number 18K 704260. Back: Red/brown design showing a classical building/pavilion with trees and pathway (often the old RBI building or similar architectural scene), "Ten Rupees" in English, and a panel with multiple Indian languages.