219-20P, 222-24P, 226-32P, 1935 2c/2B Map of Bolivia, Die proofs in issued colors on india die sunk on card (228x151mm) plus master die with blank value tablet in green, each with die number above design, Very Fine (Image)

CV. 250

C42P-C51P, 1935 5c-10B Map Airmails, Die and master proofs in issued colors on india die sunk on card plus master with blank value tablets in red brown, 227x151mm, all with die number above design, some with penciled "Stamp" in upper left corner, fresh and Very Fine (Image)

CV. 250