But, sure enough, as I was browsing Manuscript Miniatures, I found a superb example. Assuming the manuscript dating is correct, this image is from circa 1377 to 1400. Notice that the sword in the image is quite unusual in appearance as well; it almost looks to have a hollow ground cross section with fullers, like Albion's Oakeshott sword.
BNE MSS 10134 (2) Grant Cronica de Espanya
Folio 15r
Dating 1377-1396
From Aragon, Spain
Holding Institution Biblioteca Nacional de España

