Part Number: 12FR549 (5a2 chassis assy) Part Number: 12FR552 (Bit relay board) Part Number: 12FR554 (Amp brd) Part Number: 12FR555 (Ne) Part Number: 12FR582 (Amplifier) Part Number: 12FR5B (No description) Part Number: 12FR60 ((call)) Part Number: 12FR601 (Ne) Part Number: 12FR60B (Component) Part Number: 12FR60BBNBKR (Vishay ir) Part Number: 12FR60-IR (Ne) Part Number: 12FR60M (Do-4) Part Number: 12FR60PBF (No description) Part Number: 12FR614 (5999-99-801-0613)