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Thanks for the input!

Does anyone have any info on this lens?

Marked:
Series VIII
32x36
Patent: Feb 24 1903
Serial: 1861317

I was told that it's a process lens.

Nice. Very helpful everyone. Def cleared up some misconceptions and reaffirmed some general observations. THANKS!
I recently learned the trick with the window and measuring from a sharp image with a...

I have been researching/looking at brass lenses on ebay and have found that many give only the length and diameter measurements.
How do I find the focal length from these measurements?

Thanks.