373rd Heinrich Köhler auction - Day 2

1915, "G.R. MAFIA" handstamp on Yacht type 2½h.- 3r., 2½h. with violet the other with black handstamp, fresh colors and mostly good perforation, 15h. few short perfs, 2r. with minor gum toning and small thin spot and 3r. light toning and, on front invisible, vertical crease, a very rare set with the 1-3r. with less than 10 examples known, 2½h. signed Bühler, and certificates RPSL (1970) and BPA (2020)