I believe they are in a new enclosure now - more open with less glass - but i won't be in Singapore again for quite some time. The new River Safari (due to open this year) looks interesting and worth a visit.
@jusko88 Bronx tried to start a breeding prom in the USA but no other zoo accepted, they lost a lot of money with their troop and afaik none to very little breeding success
@Mickey that is not an answer to my question though. This was not an era where zoos had cooperative breeding programmes, other than in rare cases. There were a number of zoos in the USA and Europe obtaining Proboscis Monkeys at this time, and none of them were trying to form a cooperative breeding programme - they were just keeping them for their own purposes, and at least some of them managed to breed them. So, to ask my question again, what are your sources for "no other zoo accepted [a breeding programme]" and that the zoo "lost a lot of money with their troop"? Your previous response of there being no Proboscis Monkeys in western zoos now answers neither of your claims that the Bronx tried to get other zoos involved in a cooperative breeding programme nor that the zoo "lost a lot of money" by keeping the monkeys.