It has some very distinctive features for that vintage so it shouldn't be too hard to track down.
In the event that no one is able to offer a definitive suggestion, you may want to send a note to Jan Heine
who is very familiar with European tandems from that era. While his main focus is on French tandems, I'd be surprised if he isn't also familiar with non-French tandem produced in Europe in the pre- and post-war years.
There may also be some folks on your side of the pond at the UK Tandem Club who have a better feel for vintage tandems found in England. Neville Frost does a very good job of maintaining a comprehensive Web site for the Tandem Club UK and I believe they also have some forums: http://www.tandem-club.org.uk/
Last edited by TandemGeek; 11-06-07 at 05:58 PM.