These are Old Glory castings. They work really well for skirmish because they are so animated. I have a few hundred to paint up for a spot of plains wars gaming. 
I'm not sure about these check shirts, with white squares, as I haven't seen examples of contemporary shirts. I will rely on the TMP collective to "clue me in". I can always paint light blue into the white squares, on the blue check shirt, and light red into the squares of the red shirts. I think that would shirt. But if these are already OK, I won't change them.
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| Old Glory 28mm Old West US Cavalry | 
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| Old Glory 28mm Old West US Cavalry | 
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| Old Glory 28mm Old West US Cavalry | 
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| Old Glory 28mm Old West US Cavalry |