Tangut printed with moveable type — the same defective type sort (broken stroke) is used on two consecutive folios unicode.org/L2/L2017/17314… 
There are many examples of broken type pieces recurring multiple times in this text. For example the broken 𘞙 (U+18799) in the right image of the above tweet also occurs on folio 34B.
And a different 𘞙 (U+18799) with two broken strokes occurs on folios 15B, 34A, and 37B.
Broken type pieces like this seem to be one of the main characteristic feature of movable type made from baked clay, which is easily chipped; they do not seem to occur (or at least not nearly as frequently) in texts printed with wooden movable type.
On the other hand, rotated type pieces cannot really be considered to be a characteristic feature of movable type because they are so rare, not occurring a single time in this text, and afaik only once in the Chinese pagination of the Auspicious Tantra
Individual type pieces for the same Tangut character are not made from a single master but are individually created, with the result that the same printed Tangut characters can vary considerably in appearance, as seen in this example where the line "𗋚𗾫𗐱𗌭𘓐𗥒𗀩" is repeated.
