Wonderful find, Steve.P. & C. Habig Wien "Special", P. & C. Habig's "Special Qualität, Reine Handarbeit", 58 cm, possibly 1930s late 1920s and reworked later. There is no paper label but the Liner is stitched in so if reworked it was possibly in the 1950s. The Felt has a Natural finish but a soft hand. The Sweatband, Liner and Band are of very high quality.
Open Crown
I have a NOS condition P. & C. Habig Wien "Special", P. & C. Habig's "Special Qualität, Reine Handarbeit Berlin Friedrichstr. 82a" that has very similar components and from about the same time period. This is definitely one of my finest hats.
https://germanaustrianhats.invisionzone.com/topic/5-p-c-habig-hutfabrik/?do=findComment&comment=1977
Funny how there doesn't seem to be many P & C Habigs around. They don't pop up as often as other brands.