My father was lucky to find a CD 102 Brookfield number 5 last year on right. He was overjoyed when he found this CD 102 Brookfield number 4 in a box full of commons. I have it in the acid cleaning right now. I think it was Brent Burger who said that there should be number sequence of these since he had a picture of a number 6 and 5 and now here is a 4 so the theory is true. Both have bubbles in dome and are of the same shade of aqua as far as I can tell. Before anyone asks NO these are not for sale. We just wanted to share this info and welcome any comments or info. They are still out there to be found. Take care to all.