[__MatrixMan__]

Even if that's the case, some mystery remains, discussed at this point: https://youtu.be/76AvV601yJ0?si=JQi4K8w9ZvphZ1wV&t=460

Presumably you'd find similar jigs for finishing the glove nearby.

[leptons]

You also wouldn't need such a complex object for that. These things were extremely difficult to cast in the years that they were made. It would be far easier to carve a similar device out of wood as a glove-making jig.