Great honest gun there James, thanks for sharing. Looks like it would be right at home over a brace of quail dogs.
I have no knowledge of how many of what Winchester built in Model 21s, but I've seen a lot more Model 21 Tournament Grade Skeet Guns than I have Model 21 Tournament Grades. From the introduction of the Model 21 Skeet Gun through 1935 the Tournament Grade was the entry level skeet gun. Here are the Tournament Grade prices from February 24, 1934 --
Model 21 Tournament Grade, February 24, 1934, Price List.jpeg
The Model 21 Tournament Grade from the big 1934 Winchester Catalog --
1934 Model 21 Tournament Grade, Big Catalog.jpeg
The Model 21 Tournament Grade from the 1934 Winchester Pocket Catalog --
1934 Model 21 Tournament Grade, Pocket Catalog.jpeg