In a slightly mad moment I picked up a 12X15 camera on ebay at the weekend. It doesnt have any film backs and having now done some research this may be a bigger problem that I thought. I have a 450mm f9 nikkor which will cover it so just need to sort out film and holders. What options have I got ?

As an aside, it has no name but was pictured on a Gandolfi tripod, would I be able to tell if it was a Gandolfi in any easy way ?