That is the pen Phil, and better photos than I could get.
At 115mm it the same size as a Junior while the clip is the same as on the Lady. Apart from the markings there is nothing on the pen that wasn't produced by Parker and we know that they produced pens for others. The lack of a country of manufacture is intriguing but did anyone else produce the Christmas tree feed?.
Having looked around my conclusion is that it is probably a sub brand of the Danish Penol company. British pens obviously represented quality in Denmark with Big Ben using British patents and other pens such as the 'Sheffield' and I feel it is more than a nice copy. But that is just my opinion!
Oxford Everdurable was made by the German company Siebert & Löwen (Matador) for a danish trading company - it is not connected to Christian Olsen and Penol