Regency Imperial II Make Regency Model Imperial II Sams # CB-33, page 79 Regency Imperial II from the collection of Stan Whitfield Technical Specifications AttributeDetails ManufacturerREGENCY ModelIMPERIAL II Product CategoryTransceiver Mic Wiring Pin 1 – Mic Audio Pin 2 – Switch Line Pin 3 – RX Pin 4 – Shield / Ground