Iranian/Persian Mark on silver box?

[rojo531]

I have this box with chased engraving from the 60's or 70's, I believe. It has one tiny stamp of Arabic characters. Can anyone help identify? Thank you!
http://www2.filehost.to/files/2007-04-1 ... lmark1.jpg" onclick="window.open(this.href);return false;
http://www2.filehost.to/files/2007-04-1 ... 0_0001.jpg" onclick="window.open(this.href);return false;

[Hada]

No doubt this is Iranian, Sassani as it is known. The mark is too small to be read. Perhaps if a clearer photo could be posted.

Regards,
Hada