Lot
2158 
Colombia, 1921, 30c on 50c green, Handstamp Surcharge in black. 3 examples on piece, cancelled with bold violet "HIDROAVION" handstamp tying all 3 together, most unusual and scarce, minor faults, otherwise fresh and F.-V.F. Scott No. C21 $1,875 as singles.
Realized: $1,100