I am intrigued by them (and thus collect them)... pity is that the shutters are so tricky....but may restore a Derlux soon..
as you own one of them if you have the time and inclination, please help out with some data. Have a look at:
http://www.flickr.com/groups/camerap...7624692683978/
and if you can find the articles I am looking for at UKansas that would be great!)
Dirk