Receiver Meter, "Read Full Discription" Receiver Meters: These are New Old Stock Modutec Receiver Meters for Mark III, IV and IVA receivers. You should note that Browning used both Modutec and Holt made meters and that the Modutec meter will not fit into the Holt meter bezels. To tell the difference between Holt and Modutec meters is easy, the rear cover on the Modutec meters will be black and the rear cover on the Holt meter will be either white or clear. These are original meters from Browning Labs but they where sold at there closing and where not stored very well, they may have minor scratches and show some signs of aging but will be in perfect working order.