1989 Ernest Hemingway, imperforate horizontal pair, n.h., v.f., cat. $2000 (Cat No. 2418P) (Image)

Cat. $2000, Est.$500

1989 Ernest Hemingway, imperforate vertical gutter block of four, n.h., folded between stamps, natural gum wrinkles and creases, mostly at lower right, still v.f. (catalogued as imperf. singles) cat. $4000 (Cat No. 2418P) (Image)

Cat. $4000, Est.$1,000

1991 01c and 03c Birds, imperforate se-tenant horizontal gutter blocks of four, n.h., folded between stamps, v.f., scarce (catalogued as imperf. singles) cat. $700 (Cat No. 2476P, 2678P) (Image)

Cat. $700, Est.$300

1991 01c and 03c Birds, imperforate blocks of four, n.h., v.f., with 2008 PFCs ("imperforate plate proofs on gummed stamp paper") (Cat No. 2476P, 2678Pa) (Image)

Est.$250

1991 Olympics, imperforate se-tenant block of 10 (two horizontal strips of five), n.h., v.f., cat. $3000 (Cat No. 2500aP) (Image)

Cat. $3000, Est.$1,000

1991 Dwight D. Eisenhower, 25c imperforate vertical pair, n.h., slight corner crease at upper right, otherwise v.f., cat. $875 (Cat No. 2513P) (Image)

Cat. $875, Est.$200

1991 $2.90 Eagle perforated vertical gutter pair, n.h., v.f. (listed but unpriced) (Cat No. 2540P-l) (Image)

Est.$250

1991 $2.90 Eagle, imperforate horizontal pair, n.h., v.f., cat. $1000 (Cat No. 2540P-j) (Image)

Cat. $1000, Est.$250

1991 $2.90 Eagle, nine imperforate sheet margin singles, different progressive stages, including finished design, n.h., occasional marginal wrinkles, v.f., cat. $1900 (Cat No. 2540Pa-j) (Image)

Cat. $1900, Est.$500

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

Cat. $500, Est.$150

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

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

Cat. $4500, Est.$1,500

1992 Columbian Exposition, 10c,15c and $2 souvenir sheet, uncut block of four souvenir sheets, n.h., gum bends and wrinkles, otherwise v.f., rare, (Cat No. 2628P) (Image)

Est.$500

1992 Hummingbirds, imperforate se-tenant booklet blocks of ten, eight progressive stages, with large margins and control markings, n.h., v.f., rare, cat. $7200 (Cat No. 2646aPb-I) (Image)

Cat. $7200, Est.$1,500

1993 American Music, uncut pair of booklet pane covers, v.f., undoubtedly very rare (Image)

Est.$250

1993 American Music (Otis Redding, Buddy Holly, Dinah Washington and Elvis Presley), top sheet margin imperforate booklet pane of four, n.h., v.f., cat. $2000 (Cat No. 2737bP) (Image)

Cat. $2000, Est.$500

1993 American Music (Otis Redding, Buddy Holly, Dinah Washington, Bill Haley, Ritchie Valens, Clyde McPhatter and 2xElvis Presley), uncut vertical strip of eight, n.h., v.f. (Cat No. 2737Bpe) (Image)

Est.$1,500

1993 Cherokee Strip Land Run, 29c imperforate horizontal gutter strip of four, n.h., folded between stamps, v.f., cat. $750 (Cat No. 2754P) (Image)

Cat. $750, Est.$200

1993 Cherokee Strip Land Run, 29c imperforate vertical pair, n.h., v.f., cat. $400 (Cat No. 2754P) (Image)

Cat. $400, Est.$150

1993 American Music (Show Boat, Porgy & Bess, Oklahoma and My Fair Lady), 29c imperforate booklet pane of four, finished design, also two stage proofs, panes of four in blue and ultramarine only (catalogue value for the finished pane only) cat. $1250 (Cat No. 2770aP,b,c) (Image)

Cat. $1250, Est.$500

1993 American Music (Hank Williams, The Carter Family, Patsy Cline and Bob Wills), 29c imperforate pane of four, n.h., v.f., cat. $1500 (Cat No. 2778aPg) (Image)

Cat. $1500, Est.$500

1993 Classic Books, 29c horizontal gutter pane of two se-tenant strips of four, separated by vertical gutter, n.h., v.f. (Cat No. 2788a) (Image)

Est.$250

1993 Classic Books, 29c horizontal cross-gutter pane of two se-tenant vertical blocks of four, separated by vertical gutters, n.h., v.f. and rare (uncut press-sheets were never available for this issue) (Cat No. 2788a) (Image)

Est.$750

1998 Space Shuttle, $3.20 magenta, $11.75 cyan, imperforate test impressions on coated paper, printed by Banknote Corp. of America, without gum as issued, v.f., with copy of 2008 PFC for the sheets of 20 from which this originated (Cat No. 3621aP-3262aP) (Image)

Est.$250

1998 Space Shuttle, $3.20 magenta, $11.75 cyan, imperforate test impressions on coated paper, vertical pairs, printed by Banknote Corp. of America, without gum as issued, v.f., with copy of 2008 PFC for the sheets of 20 from which this originated (Cat No. 3621aP-3262aP) (Image)

Est.$500