The CTD brand is made by Stubben using the same leather and tree as normal stubben saddles, but is considered their off-brand.
17.5 inch tree, medium tree. Beautiful saddle that has been well cared for. I call this saddle my "velcro-saddle" because it really holds you in place well for over fence work and flat work. Deep seat and generous knee and thigh blocks. Will include a girth if I get the asking price.