Canal Zone, 1906, 5c ultramarine & black, imperf. Small defects, large margins all around, tied by Las Cascadas, C.Z. postmark on a cover to Cristobal, C.Z.; some cover edge wear, F.-V.F.; with 2004 P.S.E. certificate, which however declines any opinion. Scott No. 24 var.  Estimate $200 - 300. $0 (Image)