Liberia, 1919, 10¢ Registry Issues, Matrix Die Proofs, two tête-bêche sheets (240x112mm) with block of 6 of each value at ends, in issued colors, Buchanan and Monrovia sheet & Grenville and Robertsport sheet, each showing guidemarks; fold at center, Very Fine. Scott No. F15P-F16P, F18P-F19P  Estimate $200 - 300. $0 (Image)