Scovill Printing Frame format?

[Kino]

(also posted on another forum)

I bought this from a gentleman from an online forum for a very reasonable price. He thought it was a whole plate contact printing frame, but it is clearly not.

Happy with the purchase no matter what, but I am trying to determine what exact format this frame might be.

Marked "Scovill MFG. Co. NY" and "PAT APL'D FOR" under the time/exposure dial on the back; otherwise no other markings.

The front glass aperture measures 4 1/2 inches by 7 5/8 inches, but the back is 5 x 8.

I could not find an exact match on this site:

Plate sizes - Camera-wiki.org - The free camera encyclopedia
camera-wiki.org

On the "Wooden Field View Cameras of the United States: An Identification Guide" site, I found a "76" camera style that seems to match, even to the maker's stamp.

Scovill Mfg. Co. The 76 Camera Variation 3.0 (Scovill Version)

Is this a proprietary format unique to Scovill/American Optical Cameras or was it more Universal?

[domaz]

Contact frames are usually bigger than the Plate/film size to accomodate the paper. Especially back then when they were using older processes like Salt printing / Carbon where a border, non-coated part of the paper is important.