This property defines the Unicodes which belongs to Old Persian block
Characters like 𐎠,𐎡,𐎢, etc. are listed under Old Persian Block.
52 Characters are present in Old Persian Block starting with the Unicode point U+103A0 that represents the character 𐎠.
Currently, as per latest version 15.0.0, Unicode supports 328 number of Block. Here are a few examples - Latin Extended E,Adlam,Aegean Numbers, etc.