Gibbons catalogue number changes for Transvaal Become a memberEnjoy the benefits of membership for just £10.00 per year TSC libraryView our back numbers catalogue. Member downloads available Visit our blogFind out more about the fascinating story of Transvaal postage history Author: Chilton, A.R. and MacGregor, A., (pg. 28)Published in: Volume 23, Issue 2, pg. 24-44, 1988