This Collins TDR90 transponder, with part number 622-1270-001, is a reliable avionic device that has been recently removed from an aircraft. It is a great choice for those looking to upgrade their aviation equipment or for those who need a replacement part. The brand of this device is Collins, a trusted name in the aviation industry.This transponder is compatible with various aviation devices and is perfect for those who need a reliable communication device in the air. Its manufacturer part number is 622-1270-001  Serial Number 15499. It is a great addition to any aviation enthusiast's collection and is sure to provide reliable performance.