Liberia, 1902, 75¢ on $1 Ultramarine & Black, Inverted Surcharge. Horizontal pair with left stamp Thin "C" and Comma variety, full o.g., well centered, bright and fresh, Very Fine, an attractive and rare se-tenant pair, the thin "C" & comma variety inverted listed but unpriced in Scott, ex Lockard; signed A. Diena. Scott No. 91b, 91c  Estimate $300 - 400. $0 (Image)