Since I spent so much time recently agonizing over how to do my pin back, I thought I'd corral a bunch of inspiration and how-to here for my future reference and to help any of you who might also be searching for input.
But first, here's my back, finished with the inserted double pin stem. I rank this as quite easy! This photo raises an interesting question of how to photograph a brooch that is open enough to reveal the closure mechanism. But that's a question for another day. Today, let's consider interesting versions of double stem pin backs.
This is the ultimate in double pin stem mechanisms - a stand to hold the brooch when not wearing!
These turbine brooches have the classic tube hinge and wire catch construction, but the pierced backs and curved pin stems elevate the look.
An interesting variation is shown here, with a constructed hinge and soldered stem wires.
In terms of instruction, there is a simple diagram of a double pin stem system in Charles Lewton-Brain's Ganoksin entry on Hinges and Hinge-Based Catches. He also has an entry titled Some Hints on Pinback Placement.
For a simple single stem fibula, try Nicola Callow's blog tutorial, which demonstrates soldering both ends of a sterling wire onto the back, then cutting and shaping the spring loaded pin and the catch.