Here is a nice pair of CD 134 (040) Patent Dec 18 1871. These have the harder to find rear one line date. Both are in excellent condition. You will not be able to upgrade these! The left on is a lt blue aqua with thousands of tiny micro bubbles. The one on the right is a nice blue. Both list for $50 - $75 in the price guide. My price is $65 each plus actual shipping or $125 plus shipping for the pair.