1851 6c black, unused with original gum, h.r., position 34, v.f., with 1993 Graus certificate, cat. $375 (Cat No. 6) (Image)

Cat. $375, Est.US$150

1856 2r brown purple, h.r., margins all around, fine, cat. $600 (Cat No. 43) (Image)

Cat. $600, Est.US$200

1860-61 2c green (two distinct shades), also 4c orange, 12c carmine and 1r blue, all five unused with original gum, l.h. or h.r., fresh and v.f., one 2c with 2015 COMEX certificate, cat. $1235 (Cat No. 49-51,53) (Image)

Cat. $1235, Est.US$300

1866 2 cuartos rose, l.h., well centered, deep and beautiful color, also 12 cuartos orange, l.h., both v.f., the former with 1998 CEN certificate (Ed.80, 82 Euro 710) cat. $510 (Cat No. 81,83) (Image)

Cat. $510, Est.US$250

1873 "Espana", 4p red brown, unused with full original gum, h.r., well centered, fresh and v.f., pencil markings on gum, fine and scarce unused with 1998 CEM certificate (Ed.139) cat. $850 (Cat No. 199) (Image)

Cat. $850, Est.US$250

1874 4p rose, h.r., centered to right, minor gum bends, otherwise fine, signed Engel, cat. $800 (Cat No. 209) (Image)

Cat. $800, Est.US$150

1875 4p dark green, l.h., good color, fine, cat. $600 (Cat No. 220) (Image)

Cat. $600, Est.US$150

1889 4p carmine rose, small h.r., fresh and well centered, fine, with 2013 COMEX certificate (Ed.227) cat. $750 (Cat No. 269) (Image)

Cat. $750, Est.US$250

1889 10p orange red, heavy hinge remnant, centered to right, excellent color, fine (Ed.228) cat. $1300 (Cat No. 270) (Image)

Cat. $1300, Est.US$300

1938 Submarine Issue, set of six, also souvenir sheet of three, used on two large Agency covers from Mahon (14 Aug 1938) to Barcelona, with arrival (19 Aug) datestamps on back, the latter minor toning as always, still v.f., scarce on cover (Cat No. 605A-F,605G) (Image)

Est.US$500

1938 Submarine Issue, imperforate trial color proofs, 12 imperforate singles, some printed on both sides, fine-v.f. (Cat No. 605A-G) (Image)

Est.US$250

1938 Submarine Issue, imperforate sheet margin singles, set of six, n.h., v.f., cat. $875 (Cat No. 605A-G) (Image)

Cat. $875, Est.US$250

1938 Submarine Issue, souvenir sheet of three, also perforated singles from souvenir sheet, n.h., fine-v.f. (Ed. Euro 1,590) cat. $855 (Cat No. 605G,a-c) (Image)

Cat. $855, Est.US$500

1938 Submarine Issue, imperforate souvenir sheet of three on ungummed watermarked paper, inscriptions different from issued, fresh and v.f., rare, with 2018 COMEX certificate (Ed.781sa, Euro 4,300) (Cat No. 605Gvar) (Image)

Est.US$1,000

1938 Submarine Issue, imperforate souvenir sheet of three, n.h., faint toning as always, fresh and v.f., with 2015 COMEX certificate ("usual gum for issue") (Ed.781s, Euro 5,100) cat. $2900 (Cat No. 605Gvar) (Image)

Cat. $2900, Est.US$1,500

1950 Centenary of Spain's stamps, complete set n.h., v.f., cat. $375 (Cat No. 776-79,C127-30) (Image)

Cat. $375, Est.US$200

1950 Centenary of Spain's stamps, complete set n.h., v.f., cat. $375 (Cat No. 776-79,C127-30) (Image)

Cat. $375, Est.US$200

1938 Lepanto, imperforate souvenir sheets, set of two, n.h., v.f., cat. $825 (Cat No. B108O-P) (Image)

Cat. $825, Est.US$250