Re: 1950's Whitehall alto sax
I found the info below on Whitehall at woodwindforum in a Google search.
The Vintage Yanagisawa Saxophone Page
A Brief History
"During the 1960’s and 1970’s Yanagisawa provided horns to a variety of distributors in the United States who stenciled a variety of names on them. Some of the most common would be Whitehall, Dorado, Astro, Carot, and Artist. Additionally, the Buescher “Super 400″ sopranos are stencils of the S-6. Leblanc took over the distribution of Yanagisawa in the U.S. in the 1970’s and stenciled horns with the names of Martin (after purchasing Martin) and Vito (the VSP models and the Vito sopranos stamped Japan on them). Around the time of the introduction of the 800/880 series of horns Yanagisawa began putting their name on the horns that came to the U.S. market via Leblanc."