Great looking JHS modification, Steve.Carl Kellner Hamburg - J. Hückel´s Söhne "Derby". This hat was modified along the way and arrived (November, 2012) in a Campaign Hat Form so also stiffened. The crown was also extended (see photos below). The original hat was made in the 1930s but not sure when the modifications were preformed although they were well done.
Felt spacer strip stitched to the crown about one inch above the brim line was added after paper label. The ribbon was either reattached or replaced.
Here you can see the remnents of the JHS "Derby" label which is original to the hat.
Here you can clearly see the felt strip strip that was added to heighten the crown.
Looks good on you.
Sent from my HUAWEI VNS-L31 using Tapatalk