New sword find in Jerusalem, image?

[MARCvSVIBIvSMAvRINvS]

I do not think it can be classified as Roman at all. Not only the find place, namely the tunnel in which the rebels took shelter is inconsistent with any Roman legionary loosing his sword, nor does Josephus mention any massacre inside the tunnel system of Jerusalem, also the pictures do not at all make this into a definite Roman sword. It could just as well be a Herodian sword or any other type of indigenous weapon used by the Jewish town guards/rebel factions of Jerusalem itself.

M.VIB.M.