I picked up my used Mercian bicycle in September 2008 from a man in Seattle, Washington USA (where I now live).
Unfortunately, during the repaint the Serial number was lost (my guess, under a layer of paint) so I have no idea which model or year this was manufactured. The seller guessed sometime in the 70's.
I recently overhauled the entire bike and put more new modern components on it for light touring and rides around town.
Seattle, WA USA