This Mid-Continent Course Deviation Indicator MD40-66L was in-use alongside of a King KLX135. It is offered as removed (operational at time of removal) along with the panel cut-out adapter plate.

Condition is as-indicated; however, the part has not been checked by an A&P / IA. As with any part you install on your aircraft, your A&P should perform due-diligence and ensure airworthiness prior to installation.