Issued in January 1949 during the final months of the Chinese Civil War, this block of four mint stamps without gum represents the use of tax stamps as definitive postage. Printed by lithography in blue, these stamps are part of a transitional issue reflecting the Republic of China's effort to maintain postal operations amidst hyperinflation and approaching regime change. Measuring standard definitive size, they depict various modes of modern transportation including aircraft, locomotives, and passenger steamships, symbolizing progress and national infrastructure. The stamps bear a face value of 300 Chinese dollars and show variable perforations, typical of emergency or provisional printings from this tumultuous era. Well-preserved in a never hinged block of four, this issue is significant both philatelically and historically. Estimate "$90 – 120"