I wonder if in an old Model Engineer there is some reference to adding a vise to a lathe -- possibly by a correspondent via the Postbag. If there is, it could be the builder.
I bought two homemade small model marine high speed twin steam engines close to 20 years ago, at a model engineering show in nearby Windsor Vermont, supposedly built in Baltimore. Aluminum castings, sleeved. When reading through some old Model Engineers, lo and behold I came across a reference and photos of the original builder and his engines of the same type, and yes, in Baltimore.