This the 1966 Mustang Emergency / Four Way Flasher Switch that fits in the glove box. This particular version was used from March 1, 1966. It is the style with blade terminals on the back. The original wiring harness plugs into these terminals. The early version of this switch had a different wiring harness that was hard wired to the switch. This one will work on the earlier Mustangs by soldering or crimping the ends of the original harness to this switch. This switch is an exact reproduction of the original made from NOS samples and original blue prints. Be sure to check out the "more images" link above.