This is one of those 121's that has enormous domeglass, very little & shallow wire groove AND is a bubbly beauty as well. Good solid 1 1/16th inch to 1 1/8 inch domeglass, tremendous amount of seed bubbles and a good green aqua colouration in this piece bring it all together for an eye popping sparkler when backlit or underlit. It's a wonder that they could keep a wire secured to this insulator since the WG is so shallow! Condition is VVNM, it has a small flat base flake seen in pic on resting edge of base and a couple fleebites. Displays nicely. Book is $100 range. No dome numbers on this guy. My price....$50 delivered for this gem. $40 delivered.