This coin,plus the undated type (which I also have in my collection!) are the only coins that depict the portrait of Maharajah Sir Bala Rama Varma II (ruled 1924-49/91).
Although this coin was struck during the reign of Maharajah Rama Varma VI (1885-1924),this coin has his name spelt incorrectly in English as 'RAMA VURMA'.