Camera dimension confusion (Rochester Universal 5x7)

So I'm nearing completion on my restoration of a Rochester Optical Co.
Universal 5x7 camera. Or at least I *think* it's a 5x7; now I'm not so sure.

So I have two questions here. The first is whether this is actually a
5x7. Here are the relevant dimensions:

Film holder opening (the clear opening in front of the holder):
5-1/8" x 7-15/16"
Film holder outside dimensions (measuring inside stop rails):
5-11/16" x 9"
Ground glass opening (viewable area 4-3/4" x 7-3/4"

The second question is, will standard 5x7 film holders (Fidelity, Lisco,
etc.) fit this camera? Or was it made for an earlier standard size of
holder? (The camera is close to a century old.) If the latter, then I'm
pretty sure I can find some on eBay.

Thanks for any help. I'm planning on actually taking pictures with this
someday.


--
Made From Pears: Pretty good chance that the product is at least
mostly pears.
Made With Pears: Pretty good chance that pears will be detectable in
the product.
Contains Pears: One pear seed per multiple tons of product.

(with apologies to Dorothy L. Sayers)