This David Clark C10-15 has been checked and refurbished to factory specs. It has had the Intercom Mod installed and works great.

When David Clark ships the C10-15 PTT switch it will not work with the intercom it the aircraft, you will not be able to hear other people in the aircraft but with the Mod installed it will work.

David Clark description:

The C10-15 Push-To-Talk Switch allows clear, crisp transmisson to ATC for general aviation pilots. Double Pole switch contacts assure positive keying with no dead spots.Mounts securely in any aircraft with high-grade Velcro hook and pike yoke strap. Features 5-foot extended coil cord, shielded for positive protection from radio frequency and electro-magnetic interference. Durable, high-impact molded ABS housing.