This insulator just kinda puzzles me, it's an Ohio Valley toll but poured in a Denver mould. I have seen these in the standard Brookfield type mould and Hemi type mould, but why would an Ohio glass co use a Denver mould? Colour is a nice Hemingray blue and condition is VVNM.If you like the tolls, why not add this unusual Denver mould to your collection? How bout $10+$7.50 shipping?