This particular basketball related L5 example was seen in an August 25, 2001 Mastro Auction. It became part of my personal collection on March 20, 2004. As accurately stated in the 2001 Mastro auction, there is a size (10"x12") and shape similarity between the L5 Hamilton King leather and the L1 leathers that are famous for baseball players. However, the L5 leathers are much nicer and are embossed as opposed to being "burnt" into the surface. In addition, the embossed image is hand-painted. This basketball themed L5 displays the words "Basket Ball Girl", shows the #58, and displays artist Hamilton King's name.
You are likely looking at the finest condition example of the L5 Hamilton King "Basket Ball Girl". This has been a favorite in my collection for awhile.
Hamilton King: Helmar/Turkish Trophies