Help needed identifying shamshir wootz blade

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A PERSIAN QAJAR DYNASTY SHAMSHIR SWORD

With octagonal grips covered in black shagreen leather, steel pommel and guard of characteristic form. The massive blade of considerable curvature, forged of highly-contrasted black wootz steel and inaid at the forte, VICTORY FROM GOD AND CONQUEST NIGH, together with a baduh or magic square, and a polylobate cartouche containing the maker?s name, WORK OF ZAMAN ISFAHANI, a well-known smith said to have been a student of Assad Allah. In its velvet-covered wooden scabbard with black wootz suspension bands and pierced chape.Mid-18th century. Light wear. Overall length 101.4 cm.