I can't tell much from this photo...a view of the reverse is important here.
Being Craigslist I think we're lucky to get this one pic... but I'll try.
Seller says it's marked SG something, maybe SGW on the back, with a sort of cloverleaf?
i dont like it but better pictures are needed !!
If I got $300 based on these photos I'd be happy too!
" When you're chewing on life's gristle, don't grumble, give a whistle "
Wouldn't risk it with such a poor photo , also it looks to shiny and new .
They do admit that "someone else cleaned it", probably save my $$$.