Württemberg, 1857, 1kr Coat of Arms issue, Volkertz trial color proofs. 4 different, in rose, blue, light green and yellow (Köhler-Sieger S. 69/70), each with manuscript control obliteration, each mounted on card except one in rose (thinning), a Fine set, a very scarce group of proofs; each with 1990 Thoma certificate. Estimate  $1,000 - 1,500. $0 (Image)