unmounted mint Block of Four 65c-$2.60 Graf Zeppelins (C13-C15), mint blocks of four, $1.30 is T. margin block with plate no., well-centered, fresh and crisp, all are never hinged, one 65c with tiny natural inclusion, one $1.30 has some tiny trivial natural gum skips, two $2.60 are extremely fine and exceptionally choice, overall a fine-very fine set, Scott n.h. retail $8,800.00 photo est.