Yes, you're right, they were referring to the whole machine by "100 machine were made" .
When I read that they were made from "sample left over parts" I thought they wouldn't have any leftover falcon parts because they hadn't made falcons yet! So I thought they must mean leftover ST (probably just the case and keyboard), TT, and sparrow development components, and hence made the connection to the sparrow board. That was a wrong conclusion...