used alongside 1906 5c Ultramarine & black (24) on registered cover from Pedro Miguel to Boston, handstamped Postmaster Bliss cornercard, stamps tied by August 26, 1907 handstamp with double oval registry alongside, boxed Cristobal registry handstamp , backstamped Cristobal, New York, and Boston, bit of rust from a paperclip at top, otherwise very fine and attractive