Research Request -> Century Expanded optical size range illustration showing UPPERCASE and lowercase

@dberlow in https://github.com/TypeNetwork/Roboto-Flex/blob/master/docs/Sketch%20Docs/glyph%20opsz%20fall.pdf you say,

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Original is from https://www.w3.org/TR/css-fonts-4/#font-optical-sizing-def and captioned:

> Each size of Century Expanded as it existed in analog metal form. The different optical sizes, normalized here to the same physical size, have design variations to maintain stylistic traits and improve readability.

Do you have the relevant ATF specimen book with that range of Century Expanded within arms reach, such that you can make a "properly scaled" image? :)

Start with docs/Sketch Docs/glyph opsz fall.pdf and the referenced W3C CSS Fonts 4 optical-sizing definition. Research the Century Expanded specimen range and prepare a properly scaled illustration showing uppercase and lowercase. Done means the requested illustration is available for the documentation.

Written by the indexing model from the issue text.