Lot 538
Africa flight 10-25 s. on ornamental cover from "RIGA 28.5.33" to Toronto and in addition 1933, Africa flight, self-protection organization 1-5s. with additional franking tied by special cds. "RIGA-LIDPASTS 28.5.33" to Bruxelles, fine (see also Harry v. Hofmann "Latvia: Airmail 1920-1940" page 134)
