Kirk,I don't think the scabbard has been shortened. The blade looks like a replacement, ground from a sword blade. I may be wrong on this, but the grind, etching and MM look similar to that seen on imperial swords. I have attached a photo of a piece I own, it has some features in common with yours. This is a file photo, and does not show the blade. If you are interested, I can photograph and post the blade of mine (it is not marked).
Wolfgang
Wolfgang
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