Found original part?

[savagecreature]

I recently acquired a couple of Paterson Slide viewers without the internal focus lenses that were used for the treadwell eyes.
(I'm going to do other things with them that I'll tell people more about when I actually start doing it.)

On a lark, I printed one of my 3D focus lenses to see how well it would fit where it's supposed to go in the device.  I just had to share my results.

The one on the left is my lens (the yellow part) and the one on the right is a photo I collected while researching the slide viewer showing the factory part.

Mine was engineered from the photos that lichtbringer so generously provided. Though it's not absolutely perfect, I was shocked to discover that it's surprisingingly close! 

I can't wait to get my own lenses so I can correct the errors and make it a perfect match.