After sending photos of this sword to Professor Helmut Föll, he informed me that it was a luristan sword type II in his reckoning but still rather close to type I. ( mask sword) also he wrote me that he was not aware of similar ones in museums because Type II hasn’t been found very often anyway.
Professor Fool is co-author of “Absolute Dating of Early Iron Objects from the Ancient Orient: Radiocarbon Dating of Luristan Iron Mask Swords”
Published online by Cambridge University Press: 17 April 2019
to follow the work of Helmut Föll see this link :
https://www.tf.uni-kiel.de/matwis/am...tr/sb_1_2.html
a must-see research on the subject