This is an adapter board that allows a ZIP25 package ( such as TB6560) to be inserted into a breadboard.
Two SIL sockets cut to 12 and 13 pins in length provide a “ZIP25 socket”, then a 12 and a 13 pin header are modified by pushing the pins through so that only a stub of plastic remains on the component side. Everything is then soldered on the under side:
Here’s the layout. Note that drill holes have been reduced to making drilling with a Dremel easier.
The archive includes a gEDA source file for the single-sided PCB.