Thanks for that document, unfortunately, I don't know DCR, Soo I make first blind attempt ,same winding arrangement as Lo1166
It turn to be Not vintage
11,3 H
DCR 11-11-29-29
z 600-600
6hz- 75khz +-3db
This is temporary, I want originally specs..stil searching
In meantime I bought lo1173 2pcs.
I will open one this weekend.