It's not that surprising if you think about it. He wore that stovepipe hat in his first televised story, which made an impression. That hat then made numerous appearances in several of the old "TV Comics" that were put out at the time. So, that hat has a better history of being in the comics than on TV. It only makes sense to have it in here.
I love digital comics. I believe the trade of this is out of print so it makes it possible for people to still read this story. Also check out the issue I wrote: [link] This is also currently out of print.