Delightful serendipity! Yesterday I found a post about a strange Victorian hat-fitting device – The Conformateur. I had never heard of such a thing before, but the Victorians did come up with some fascinatingly innovative (though not always practical / functional) devices. Essentially, you place a piece of paper in the top of the device and place it on your head. “Fingers” in the device press to the shape or your head and make pin marks in the paper, late allowing the milliner to replicate the shape for a custom-fit hat.

Lots of pics on the originating site, including detailed shots of the workings and original diagrams. Here is another post about another conformateur owner who used 3D printed parts used to repair their device.

(Both posts were originally found on BoingBoing)