Just an observation and comment, your Stewart is sporting the narrow tone arm similar to mine. As I've mentioned in another thread these machines often don't have interchangeable parts. These are curious machines in that they seem to be a hodge-podged assemblage of parts. You'll notice the one that I have with narrow tone arm (see picture) is not exactly the same as yours. The reproducer configuration is definitely different.
(now you'll need to collect all the various configurations...
