Collins 621A-6 ATC Transponder P/N 787-6211-001 (Overhauled w/8130) from $896.70 Qty. Add to Cart Condition: RemanufacturedCondition Description: overhauled with 8130-3See condition in pictures, guaranteed to function and pass inspection.Manufacturer Part Number: 787-6211-001 Qty available: 1 Tweet