This is the replacement turn signal switch for the 1967 Corvette from Lectric Limited. These switches are unique to the 1967 model year and were unavailable anywhere until recently.
In addition to a socket set, flat-blade and Philips screwdrivers, you'll also need a steering wheel puller. You can get one at the local auto parts store for under $15.00 if you don't have one.
Use a Philips screwdriver to remove the two screws that hold the plastic steering column cover. When the two screws are out, the halves separate easily. You can also remove the two screws that hold the column support to the bottom of the gauge cluster at this time.
The horn button snaps off easily by pulling up on it, thus exposing the screws that hold the horn contact/button retainer on.