Stamped on back ""Please Credit U. S. P. H. S. United States Public Health Service"", ""Please Note: Kindly Return Unused Photos to the Office of Health Education, U. S. Public Health Service, Washington, D. C."", written on back ""#34"", In squares ""34"", ""35"", ""Together with #35 to make 7 5/8 inch wide bleed"", in a circle ""27/8inch wide"", ""30""