Re:
Yep, I think the Concor was a 1970s or 80s model. Very nice saddle and quite collectible but not really correct for this bike (that is if you're bothered about it being correct - perfectly good if you just want to ride the bike).
Fluted seatpost is also a bit more 1970s/80s.
Very cool if it's a cyclocross bike.
I wonder why the headbadge is cut down like that.
Good luck with whatever you decide to do with it.