Walden-Worcester Oval-Drive 5828 Socket
During the mid 1920s Walden received a patent for a configurable type of socket wrench, with the sockets secured to the handle by set-screws instead of being permanently mounted. This allowed a shop to make up its own special-use socket wrenches, combining the socket sizes most commonly used together. The design was covered by patent #1,596,708, issued to F.H. Bellows in 1926.
The idea seems not to have caught on though, as these tools appear to be very rare. However, we were able to acquire one of the special sockets used with these wrenches.
Mel