Looks like a Concorde to me, bottom bracket shell and serial number format is very similar to these 2 known Concordes. Checking your pictures there are other similarities to my blue one, rear brake bridge, dropouts etc. Does it have the Concorde logo engraved on the fork crown? Is there anything stamped on the other side to the serial number, sometimes they have size and tube details.
Dating or identifying a Concorde from the serial number, not possible (at the moment anyway)
Dating or identifying a Concorde from the serial number, not possible (at the moment anyway)