TubeNet

http://cgi.ebay.com/Silver-Conn-Eb-Tuba ... 5d294ae851

Whether it is or not, I can't see it being worth $1,147.97. Whatever it is, it looks smaller than a Giant yet bigger than the little ones. Cool horn!

Looks like the Eb version of the 28J.

Looks like a couple Giants I've had over the years, the first is a 1914 Conn Giant #134XXX, Eb 3v FA, I had listed on the bay myself for awhile, and I still own. The second, is also a giant, I sold 3 years ago. Same layout on both and the Eb in question.
It's a 19" bell, and without going to measure it, if I remember the horn stands 35-36" tall.