wowzers!!! thats an alley flame and those are hot-hot -hot right now...no pun intended..that marble was prob either made at the peenboro or the st marys location in the mid thirties thru the forties....in hand it would have to be compared to known examples to be sure.....the base glass is the answer....the ammount of flame tips would make it a 10-20$ marble and someone would be sure to pick it up!!! if its bigger than 11/16 it would fetch the higher end of the estimate...nice find!!!