1951-54 Selection of imperforate trial colors, Postage and Air Post, 20 different blocks of four, also six imperf. horizontal pairs, v.f. (Cat No. 619/C59P) (Image)

Est.$500

1960 150th Anniversary of the May Revolution, specially prepared booklet with regularly issued stamps and souvenir sheets, plus 17 imperforate blocks of four, trial colors on gummed stamp paper, v.f. (Cat No. 713-16,C73-76P) (Image)

Est.$150

1930 Zeppelin First Flight blue overprints, complete set of five used on flown, cacheted cover (21 May) to New York, v.f., with appropriate transit and arrival pmks, signed Roger Koerber, with Raybaudi certificate, scarce complete set on one cover (Si.Euro 650) (Cat No. C20-24) (Image)

Est.$500