1851 1c blue, type Ib, pos. 8R1E, double transfer variety clearly showing the type characteristics, black grid cancel, margins just touching at bottom, clear on all other sides, which is quite rare for this issue, bright color, vertical crease, otherwise a v.f. example of this scarce stamp, with 2020 PSE certificate (catalogue value for margins touching on one side) cat. $11000 (Cat No. 5A) (Image)

Cat. $11000, Est.$6,000

1851 1c blue, type I, unused without gum, full margins all around including sheet margin at bottom, nice color, with 1980 and 2019 PFCs, the latter graded "XF 90" (SMQ $600) (Cat No. 7) (Image)

Est.$600

1851 1c blue, type I, black Boston Paid cancel and part red cancel, full to large margins all around with part of adjoining stamp at top, with a 2020 PSAG certificate graded "95" and a 1995 PFC for a pair from which it originated (SMQ $750) (Cat No. 7) (Image)

Est.$400

1851 10c green, type I, used, full margins all around, with 2015 PSE certificate graded "VF 80" (SMQ $825) (Cat No. 13) (Image)

Est.$700

1851 10c green, type I, San Francisco postmark, large margins all around including part of adjoining stamp at left, two creases, v.f. appearance, with 2020 PFC, cat. $800 (Cat No. 13) (Image)

Cat. $800, Est.$300

1851 10c green, type IV, pos.65L1, black grid cancel, full to large margins all around including part of adjoining stamp at top, v.f., with 2020 PSAG certificate, cat. $1600 (Cat No. 16) (Image)

Cat. $1600, Est.$1,000

1851 10c green, type IV, pos. 86L1, used, margins just in at left, full to ample on all other sides, horizontal and corner creases, otherwise fine, with 2020 PSAG certificate, cat. $1600 (Cat No. 16) (Image)

Cat. $1600, Est.$450