Looks like it's in honor of the Cyrus Cylinder, an important archaeological artifact/document from the Achaemenid Persian Empire: https://en.wikipedia.org/wiki/Cyrus_Cylinder
I found a few websites https://www.coinarchives.com/w/lotv...&Lot=924&Val=f2496d965a05be6563d7e91df2ceeceb and https://www.numisbids.com/n.php?p=lot&sid=1408&lot=698