BETWA, Indian Navy frigate. Launched Vickers-Armstrongs, Walker, on 15.09.1959,
completed 08.12.1960 (details from Miramar)
Outline details from another source: The first Betwa was a Leopard class anti-aircraft frigate commissioned in the UK in 1960. She served the Indian Navy till 1991. (ignore the hms bit of the image caption!)
Ron