I have a consignment of a "1A7" transistorized guard receiver module, sealed in a plastic bag with two Collins tags, the green, "Tested O.K." one dated 2-27-64. It measures about 3x4x1.5", and says type 528-0090-005 MCN 1505 on it. Details at 11, if needed ... if anyone even wants the thing, I'll give precedence to whomever tells me what it is ... e