What museum was this taken at? If I get that information, maybe I can check their collections database if it is publically accessible and find more detailed information from there (including locality of capture).
Could be Indian. The Javan rhino from the NHM I have a picture of is different, and I don't have one of the Indian. Probably because it looks more like a model than actual taxidermy - therefore I didn't keep a picture in my collection.
According to the NHM catalogue, all of the specimens of Sumatran rhinoceros in the collection that have a locality are from Riau Province in Sumatra, making them the nominate race.
This elderly female individual was ‘collected’ in the January of 1932 by Arthur S. Vernay in the Kroh Forest, Perak, in what was then the Malay States (now Malaysia). The specimen was subsequently prepared and mounted by the taxidermy firm Rowland Ward Ltd, for the NHM. Later, she was placed in the “Hall of Game Animals of the Empire”, and then, where this photograph was taken, in the “Mammals Hall”. Hence, this individual is likely of the nominate subspecies, E. s. sondaicus, given its once vast habitation across the Malaysian Peninsula, Sumatra, and Java (where the entire species now barely clings to survival).