120 to Kodak 116 film adapter
thingiverse
There's a couple other 120-to-Kodak-116 film adapters on here, but none of them fit my 1917 Kodak 1A Autographic special. This one does. It may also fit other 116 cameras. Unlike some other designs that keep it off to one side, this centers the film inside the camera - so you'll need two of those per spool of 120 film (that is, 4 for the whole camera). It's not the most mechanically robust design ever, but it hasn't broken yet.
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