1875 Agriculture, 10c yellow, overprinted Specimen in red, without gum as issued, only 390 sold, cat. $400 (Cat No. O5S) (Image)

Cat. $400, Est.US$150

1875 Interior, 6c vermilion, overprinted Specimen in blue, without gum as issued, pulled and short perforation, otherwise fine and scarce, only 83 sold, with 2018 PFC, cat. $2500 (Cat No. O18S) (Image)

Cat. $2500, Est.US$500

1875 Justice, 10c purple, overprinted Specimen in blue, without gum as issued, fine, only 163 sold, with 2021 PSAG certificate, cat. $1250 (Cat No. O29S) (Image)

Cat. $1250, Est.US$500

1875 Navy, 2c ultramarine, overprinted "SEPCIMEN" variety in carmine, without gum as issued, faint crease and additional small faults, otherwise fine and rare, with 2019 PFC, cat. $4500 (Cat No. O36Sa) (Image)

Cat. $4500, Est.US$850

1875 State, 1c bluish green overprinted "SEPCIMEN" variety in carmine, without gum as issued, inclusion above the "S" in "U.S", otherwise fine and rare, with 2018 PFC, cat. $2500 (Cat No. O57Sa) (Image)

Cat. $2500, Est.US$650