Signed as the zoo as being from "Kalimantan/Borneo".
The zoo didn't sign any of their binturong into any designated subspecies level, but all of them are signed up to a "locality level", like from Sumatra, Java, or, in this case, Kalimantan/Borneo. This specimen being almost entirely dark in coloration, a trait described in the Bornean subspecies, this might potentially be true.