Some months ago, I picked up a mix of R15C's, a cheap mix, thought I saw some nice cancels in the mix. Upon receiving the mix, also discovered a real nice sound R14C, with partial cancel.
The stamp in question has just come out of my extensive Work in Process (WIP).
Interesting cancel, too late at night to research this cancel.
Sound, perfs. in tact, a rather right and proper nice stamp find.

Cheers
David (Stampmaster)