Stefan, great! Always nice seeing these old survivors. Thanks for postingSools woolfelt hat in black. Unsure about the maker, because all of the labels are gone. Sools had hats made by various manufacturers with Mossant and Laubin as the ones I've seen most often. Size 57 with the brim at 6cm and the crown at 11cm at the center dent. Really nice proportions to the hat. Even has a bit of reverse taper. First time I've seen a woolfelt hat for Sools, but that could be because they didn't survive. Weighs in at 138 grams. Also an early one.
There was a label there once (picture above). The square size points towards Mossant as the most likely maker.