#RB11a1875-81 1c Proprietary Stamp silk paper, green
$2.25- $3.50 #RB15b1875-81 4c Proprietary Stamp - watermark, perf, red
$5.75- $8.50 #RB12b1875-81 2c Proprietary Stamp - watermark, perf, brown
$2.25- $3.25 #RB13b1875-81 3c Proprietary Stamp - watermark, perf, orange
$4.00- $6.00 #RB12a1875-81 2c Proprietary Stamp - silk paper, brown
$3.25- $5.00 #RB13a1875-81 3c Proprietary Stamp - silk paper, orange
$12.00- $18.00 #RB291898 3 3/4c Proprietary Stamp - Rouletted 5 1/2, olive gray
$14.00- $55.00 #RB471914 1/2c Proprietary Stamp - offset, watermark, perf 10, black
$4.25- $6.75 #RB261898 1 7/8c Proprietary Stamp - Rouletted 5 1/2, dull blue
$2.25- $21.00 #RB491914 1c Proprietary Stamp -offset, watermark, perf 10, black
$5.75- $8.50 #RB521914 17/8c Proprietary Stamp - offset, watermark, perf 10, black
$1.15- $2.25 #RB381914 21/2c Proprietary Stamp - offset, watermark, perf 10, black
$4.50- $24.00 #RB1a1871-74 1c Proprietary Stamp - George Washington, green & black, violet paper
$7.75- $11.50 #RB551914 3c, Proprietary Stamp - offset, watermark, perf 10, black
$4.00- $9.00 #RB671919 3c Proprietary Stamp - offset, perf 11, dark blue
$1.00- $2.50 #RB681919 4c Proprietary Stamp - offset, perf 11, dark blue
$1.00- $3.75 #RB531914 2c Proprietary Stamp - offset, watermark, perf 10, black
$6.75- $11.00 #RB14a1875-81 4c Proprietary Stamp - silk paper, red brown
$9.25- $14.00 #RB691919 5c Proprietary Stamp - offset, perf 11, dark blue
$1.50- $5.00 #RB301898 4c Proprietary Stamp - Rouletted 5 1/2, purple
$1.75- $21.00