|This typewriter was not all that dirty.|
|The type slugs were really filled with dirt, grime and old ink. The degree symbol must not have been used much as it was not filled with dirt.|
|pP, q, e, Dd, 9, g, etc. were especially filled.|
|The small keys on the very left and right of the top row are the TAB Clear and Set.|
|Margin settings are easily and clearly seen through the slots. The left is not as visible in the photo as it is red. I should have fill flashed it.|
|These are the margin stop setting buttons. They push in and slide.|
With a bit more searching on line I found this page on Alan Seaver's Machines of Loving Grace. It appears the Ace is a rebrand or different name for the same model. I suspected Universal from looking at other typewriters and from what was on Will Davis's website and Alan's site I found a bit more information.
Scroll about half way down the page in the link to two newer brown and tan Underwood Ace typewriters.