I have any questions about sassanian swords.  
I know a lot of pictures of splendid ful metal scabards and hilts as this
 
 
I would like to know what blade had this swords. Single, or double edge?  I have found only one picture of sassanian blade - it is probabaly double edge blade with middle point - see here
 
Are there sassanian swords with single edge blade like this contemporary chines blades?  /I think Tang dynasty blades/