The top left is a very nice nice hand-gathered marble--a keeper for sure. It may be from any maker but the condition is great.
The top right is more than likely a MFC.
The bottom left, although a very nice looker is a Jabo or even a Champion imho. This one needs some more input.
The bottom rightāwellāit is a beat up Amber slagāhard to tell.
All opinions are always welcomed and appreciated.
MarbleāOn!!