Postal Card, 1891, 1¢ black on buff, Columbian Exposition cards (Scott UX10 var.), Koehler, Set 7, mixed printings; most with slight mounting damage on the address side, otherwise Fine to Very Fine.
USPCC EX62//EX73.
USPCC $600. (Image)

Estimate $400-600

Postal Card, 1891, 1¢ blue on grayish white, printer's make-ready (Scott UX11 var.), uncut vertical pair of cards with two incomplete impressions in blue, and two in black, the latter inverted; small faults, Fine to Very Fine.
USPCC S12 var. (Image)

Estimate $500-750

Postal Card, 1902, 1¢ black on buff, the "full-face McKinley" (Scott UX17P), just about pristine, with straightline violet "SPECIMEN - Not good for postage" handstamp, Very Fine. (Image)

Estimate $750-1,000

Postal Card, 1902, 1¢ black on buff, the "full-face McKinley" die proof (Scott UX17P), type I die proof inscription with "SPECIMEN - Not good for postage" handstamp in the address area, very light diagonal bend at the lower left, otherwise Very Fine. (Image)

Estimate $500-750

Postal Card, 1964, 4¢ Social Security, blue omitted (Scott UX51b), a lovely mint card, Very Fine.
2015 UPSS S69aa; $550.
Scott $625. (Image)

Estimate $300-400