Hey guys...The F style case shape looks somewhat like a Calton, only not fiberglass. The A style is a rectangular case. They are both fitted so the type of mandolin fits snuggly inside. I am still trying to get the model number but have not seen our buyer yet. Anyway, I'm confident you will like them when you get them. I will post the model numbers when I get them. Thanks.
Oh, I forgot...when I said 'we stood on them' it was definately not me. They would have preferred an elephant...less weight .