I googled and found a picture of one at http://collectiblend.com/Cameras/Ise...ss-Deluxe.html. The image seems to have been of a camera sold by LeicaShop, which they say had a 135/4.5 Tessar; judging purely from the picture, it kind of looks to me like it was intended as a competitor at the Voigtlaender Avus level, a quality 9x12 camera with a good, but not extraordinary, lens and good fit and finish.

I can't find anything whatsoever about this "ISE" company in general, though.