I'm no expert on Thiels, but what makes you think your Conception Electronics are Thiels? Again, I don't know Thiel's history too well, but they don't look like any model I've seen from them, and I didn't see anything in your pictures that led me to think they were related.
Found some very early Thiels
Bought a pair of Conceptions Electronics Model 01 speakers at a flea market and it turns out they are Thiels (that was their original name).
Don't know much else yet, any help would appreciated. See photos at the links below.
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/concpt4.jpg
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/concpt5.jpg
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/conct2.jpg
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/conpt3.jpg
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/conct1.jpg
Don't know much else yet, any help would appreciated. See photos at the links below.
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/concpt4.jpg
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/concpt5.jpg
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/conct2.jpg
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/conpt3.jpg
http://i269.photobucket.com/albums/jj76/mjschatz/Conceptions%20Speakers/conct1.jpg