"Ladies of the evening" were licensed professionals from 1893 to the early 1920's in the city of Rosario, Santa Fe province, Argentina. Here is a sampler of the "health" stamps they were required by law to obtain for their own good and that of their clients.
Page 01 Title PagePage 02 1893 Manuscript Control Numbers
Page 03 Remainders of the 2 Centavo Issue
Page 04 1893-1896 1 and 2 Peso Issues
Page 05 1897-1898 2 Peso Issue
Page 06 1899-1900 2 Peso Issue
Page 07 1900-1901 2 Peso Issue
Page 10 1904 1, 2, and 4 Peso Issues
Page 12 1905 2 and 4 Peso Issues, 1906 1 Peso Issue
Page 13 1907 and 1908 1 Peso Issues
Page 14 1908 and 1909 1 Peso Issues
Page 15 1910 1, 2, and 4 Peso Issues