622-4938-001, RMI-30, Collins Avionics Radio Magnetic Indicator / RMI

Collins Avionics RMI / Radio Magnetic Indicator. Model RMI-30. P/N 622-4938-001. It was removed for avionics upgrade, however though, bottom left selector button was lost during removal. Sold as a core or for display only, as is, no returns will be accepted..