These LRI's are not in Steve Bob's book, but have since been identified and assigned number 83 by him. What makes it different is the base is not rounded as you can see by the comparison. 2-inch base diameter, 1 13/16 or 2" high… Depending on how much extra over pour glass is counted. The non amber swirl one has the slight bit of extra glass. Both have square non chipped side tabs. The shaft seems slightly tapered. Both have only the slightest of small exit edge flakes –VNM for LRI's Both light aqua. $350.00 for the amber swirl. $290 for the other one.