1960 4c Boy Scouts of America, two misperforated varieties, n.h., v.f. (Cat No. 1145var) (Image)

Est.$100

1979 $1.00 Rush Lamp & Candle Holder, intaglio brown color inverted, n.h., v.f. The so-called CIA invert is one of the best known inverted color errors in United States philately. These stamps were discovered by an on-duty CIA employee who teamed up with some colleagues to purchase the pane from a post office. Saving a copy each, the group later sold the bulk of the sheet to a prominent stamp dealer. News of the error reached CIA officials who sought to claim ownership, and US Postal authorities tried to recover the stamps. Official queries, threats, and even job losses followed the group until the sale of the pane was ruled legal. Only about 80-85 copies are accounted for, cat. $17500 (Cat No. 1610c) (Image)

Cat. $17500, Est.$12,500

1979 John Paul Jones, 15c finished design, imperforate bottom sheet margin Plate Number block of 10, n.h., v.f. (Cat No. 1789Pg) (Image)

Est.$250

1989 Ernest Hemingway, imperforate upper left sheet corner margin Plate No. block of four, n.h., minor natural gum wrinkles and light fingerprints, still v.f. (catalogued as imperf. singles) cat. $4000 (Cat No. 2418P) (Image)

Cat. $4000, Est.$1,000

1989 Ernest Hemingway, imperforate vertical gutter block of four, n.h., folded horizontally in gutter between stamps, minor natural gum wrinkles and light fingerprints, still v.f. (catalogued as imperf. singles) cat. $4000 (Cat No. 2418P) (Image)

Cat. $4000, Est.$1,000

1991 01c and 03c Birds, imperforate vertical gutter blocks of four, n.h., paper wrinkles, otherwise v.f., cat. $700 (Cat No. 2476P, 2678P) (Image)

Cat. $700, Est.$250

1991 01c and 03c Birds, perforated cross gutter blocks of 16, n.h., folded horizontally between stamps, n.h., v.f., extremely rare (Cat No. 2476P, 2678Pa) (Image)

Est.$500

1991 01c and 03c Birds, imperforate horizontal gutter se-tenant strip of four, folded between stamps, n.h., v.f., undoubtedly very rare (Cat No. 2476P, 2678Pa) (Image)

Est.$300

1991 Olympics, imperforate se-tenant strip of five, n.h., right stamp (swimmer) creased, otherwise v.f., cat. $1500 (Cat No. 2500aP) (Image)

Cat. $1500, Est.$500

1991 Olympics, imperforate cross-gutter pane of eight (!) se-tenant strips of five, showing color chart and Olympic Emblems at both sides, n.h., vertical fold through four stamps at left (25c Swimmer), also horizontally in gutter between stamps, otherwise v.f. A unique and spectacular piece (catalogued as eight imperforate strips of five) cat. $12000 (Cat No. 2500aP) (Image)

Cat. $12000, Est.$3,000

1991 Eisenhower, 25c imperforate left sheet margin inscription & imprint block of eight, n.h., v.f. (catalogued as four pairs) cat. $3500 (Cat No. 2513P) (Image)

Cat. $3500, Est.$1,000

1991 "F" stamp, perforated horizontal and vertical gutter pairs, folded between stamps, n.h., v.f. (Cat No. 2517var) (Image)

Est.$150

1991 $2.90 Eagle, nine imperforate gutter pairs, different progressive stages, including finished design, n.h., v.f., cat. $3150 (Cat No. 2540Pa-I) (Image)

Cat. $3150, Est.$1,000

1991 $2.90 Eagle perforated vertical gutter pair, n.h., v.f. (Cat No. 2540Pl) (Image)

Est.$250

1991 $2.90 Eagle perforated horizontal gutter pair (with plate markings), n.h., v.f. (Cat No. 2540Pl) (Image)

Est.$250

1991 $2.90 Eagle perforated cross-gutter block of four (with plate markings), n.h., v.f., rare (Cat No. 2540Pl) (Image)

Est.$500

1992 Eagle & Shield, 29c imperf. (die cutting omitted), booklet pane of 17, n.h., v.f., cat. $725 (Cat No. 2595d) (Image)

Cat. $725, Est.$250

1991 23c Flag, Presorted First Class, top sheet margin block of four imperf. horizontally, n.h., v.f., cat. $500 (Cat No. 2605P) (Image)

Cat. $500, Est.$150

1992 Columbian Exposition, complete set of six imperforate souvenir sheets, n.h., v.f., cat. $4500 (Cat No. 2624P-29P) (Image)

Cat. $4500, Est.$1,500

1992 Hummingbirds, eight imperforate booklet panes of five, progressive stages, n.h., two miscut at right, otherwise v.f., cat. $3600 (Cat No. 2646aPb-I) (Image)

Cat. $3600, Est.$1,000

1992 Christmas Toys, imperforate block of four, n.h., v.f. (Cat No. 2718aP) (Image)

Est.$250

1992 Christmas Toys, 29c block of four imperf. horizontally and at right, n.h., v.f. (Cat No. 2718aP) (Image)

Est.$250

1992 Christmas Toys, value and inscriptions omitted, imperforate se-tenant block of four, cat. $1200 (Cat No. 2718aPb) (Image)

Cat. $1200, Est.$500

1992 Christmas Toys, 29c imperforate block of four, green denominations omitted, n.h., v.f., cat. $1200 (Cat No. 2718aPg) (Image)

Cat. $1200, Est.$500

1993 American Music (Otis Redding, Buddy Holly, Dinah Washington and Elvis Presley), top sheet margin imperforate booklet pane of four, n.h., v.f. (listed but unpriced) (Cat No. 2737aP) (Image)

Est.$500