Sandafayre has an image of a strip that is almost too good to be true...wide, narrow and omitted...small, though...
http://www.sandafayre.com/gallery/stamp_1145.htm(here it is for those shy about clicking links)

I'm pretty sure I don't have one without a cancel. I've picked up several COGH accumulations over time, but most of the stamps are used. If you find a nice scan, please post!
Collin