Rare Vintage 9 Piece 1/2" Drive Tony W. Helm Swivel Sockets MADE IN THE

Up for auction is a Rare Vintage 9 Piece Tony W. Helm Swivel Socket Set that was MADE IN USA. I couldn't find any for sale, I assume there out of business. I used the patent date to find out about swivels. Tony's design supposedly was used by Snap On and Mac although I cant find any of the exact sockets. Tony was on the cover of Ebony magazine but I wasn't able to find the article.
The set consists of:
1/2", 9/16", 5/8", 11/16", and 3/4" Swivel Sockets
1/2" Drive Swivel Extension
1/2" Drive Double Swivel Extension
1/2" Drive 13/16" Spark Plug Swivel Socket Missing Rubber Cup
1/2" Drive 13/16" Spark Plug Double Swivel Complete

Returns Accepted for this item if it's within 30 Days