Wondering if anyone can identify this interesting hand torch I found in some bins of equipment I purchased. It doesn't have any markings on it.

It is a gas-oxygen torch for use with borosilicate glass.  (note the non-piloted tips, which indicate oxygen rather than air)  I suspect this one may be a Kahle, but I am sure others made them as well.  I have an old advertisement for them and will add it to this thread when I find it.  (I collect vintage neon shop tools, so please keep me in mind if you later decide to part ways with it.)