The crest is likely contrived by the artist's whim. That style of glass is so terribly common in the late sixties/early seventies. I have a basement full of it. Even if by a known maker like Libby, it's not terribly valuable unless you're a retro nerd and just into setting up your house in a pop style.

Wasn't even looking for it and i came across this.....

But still that pattern name when goggled doesn't come up with anything.

Here is a link that might be useful: Ebay glass

I have several of these glasses and the crests come in different colors. I don't see them often in the antique world but mine have gone unsold for over a year. Doesn't seem to be much interest from buyers. Mine have no markings but are old. No way to know for sure but I think they are Libby and from the sixties.