Rare red amber Whitall Tatum

This very rare insulator was 1 of 2 that I had picked up on eBay back in 07'. This is a red amber CD 154 Whitall Tatum, and from my understanding only a dozen or so of these were made, they were solely an experimental piece in this specific color and used along one line in N.J. Despite that, this CD style is very common in most other shades and colors, however, a few colors such as light aqua with iridized top, light aqua with silver top, straw with silver top, carnival glass and light aqua with carnival are also fairly rare to find.