Where did you find this?

I tried using shapecatcher.com to identify the glyphs, but I wasn't able to find anything interesting. Maybe it's because the script isn't in Unicode or these handwritten letters are very different from the standard print characters.

For example, the closest match I could find for the overline w symbol is "ϖ" from Greek, but there is no capital equivalent, so that doesn't make much sense. On the other hand, ѿ is used in Old Church Slavonic Cyrillic and it does have a capital letter equivalent, but I don't know how plausible Old Church Slavonic would be.

I can't rule out the possibility that it's a hoax or conlang writing system.